diff --git a/build/wire.rs b/build/wire.rs
index 71b267cc..e6f81b1f 100644
--- a/build/wire.rs
+++ b/build/wire.rs
@@ -211,6 +211,8 @@ enum Type {
     Id(String),
     U32,
     I32,
+    U64,
+    U64Rev,
     Str,
     OptStr,
     BStr,
@@ -475,6 +477,8 @@ impl<'a> Parser<'a> {
                 })?;
                 Type::Pod(ty.val)
             }
+            b"u64" => Type::U64,
+            b"u64_rev" => Type::U64Rev,
             b"u32" => Type::U32,
             b"i32" => Type::I32,
             b"str" => Type::Str,
@@ -495,6 +499,8 @@ impl<'a> Parser<'a> {
                         Type::Id(_) => {}
                         Type::U32 => {}
                         Type::I32 => {}
+                        Type::U64 => {}
+                        Type::U64Rev => {}
                         Type::Fixed => {}
                         Type::Pod(..) => {}
                         _ => {
@@ -561,6 +567,8 @@ fn write_type<W: Write>(f: &mut W, ty: &Type) -> Result<()> {
         Type::Id(id) => write!(f, "{}Id", id)?,
         Type::U32 => write!(f, "u32")?,
         Type::I32 => write!(f, "i32")?,
+        Type::U64 => write!(f, "u64")?,
+        Type::U64Rev => write!(f, "u64")?,
         Type::Str => write!(f, "&'a str")?,
         Type::OptStr => write!(f, "Option<&'a str>")?,
         Type::BStr => write!(f, "&'a BStr")?,
@@ -662,6 +670,8 @@ fn write_message<W: Write>(f: &mut W, obj: &str, message: &Message) -> Result<()
             Type::Id(_) => "object",
             Type::U32 => "uint",
             Type::I32 => "int",
+            Type::U64 => "u64",
+            Type::U64Rev => "u64_rev",
             Type::OptStr => "optstr",
             Type::Str => "str",
             Type::Fixed => "fixed",
@@ -687,6 +697,8 @@ fn write_message<W: Write>(f: &mut W, obj: &str, message: &Message) -> Result<()
             Type::Id(_) => "object",
             Type::U32 => "uint",
             Type::I32 => "int",
+            Type::U64 => "u64",
+            Type::U64Rev => "u64_rev",
             Type::OptStr => "optstr",
             Type::Str | Type::BStr => "string",
             Type::Fixed => "fixed",
diff --git a/src/cli/screenshot.rs b/src/cli/screenshot.rs
index c9dd0e9a..cddaf540 100644
--- a/src/cli/screenshot.rs
+++ b/src/cli/screenshot.rs
@@ -67,7 +67,7 @@ async fn run(screenshot: Rc<Screenshot>) {
             width: ev.width as _,
             height: ev.height as _,
             format: XRGB8888,
-            modifier: ((ev.modifier_hi as u64) << 32) | (ev.modifier_lo as u64),
+            modifier: ev.modifier,
             planes,
         };
         res.push(Ok((buf, Some(ev.drm_dev))));
diff --git a/src/ifs/ext_image_copy/ext_image_copy_capture_frame_v1.rs b/src/ifs/ext_image_copy/ext_image_copy_capture_frame_v1.rs
index 126e50ab..0320e708 100644
--- a/src/ifs/ext_image_copy/ext_image_copy_capture_frame_v1.rs
+++ b/src/ifs/ext_image_copy/ext_image_copy_capture_frame_v1.rs
@@ -270,8 +270,7 @@ impl ExtImageCopyCaptureFrameV1 {
         }
         self.client.event(PresentationTime {
             self_id: self.id,
-            tv_sec_hi: (tv_sec >> 32) as u32,
-            tv_sec_lo: tv_sec as u32,
+            tv_sec,
             tv_nsec,
         });
         self.client.event(Ready { self_id: self.id });
diff --git a/src/ifs/jay_screenshot.rs b/src/ifs/jay_screenshot.rs
index d388fdd9..bcc1c536 100644
--- a/src/ifs/jay_screenshot.rs
+++ b/src/ifs/jay_screenshot.rs
@@ -35,8 +35,7 @@ impl JayScreenshot {
             height: height as _,
             offset,
             stride,
-            modifier_lo: modifier as u32,
-            modifier_hi: (modifier >> 32) as u32,
+            modifier,
         });
     }
 
diff --git a/src/ifs/wl_seat/tablet/zwp_tablet_tool_v2.rs b/src/ifs/wl_seat/tablet/zwp_tablet_tool_v2.rs
index 28aec218..a39a4905 100644
--- a/src/ifs/wl_seat/tablet/zwp_tablet_tool_v2.rs
+++ b/src/ifs/wl_seat/tablet/zwp_tablet_tool_v2.rs
@@ -63,16 +63,14 @@ impl ZwpTabletToolV2 {
     pub fn send_hardware_serial(&self, serial: u64) {
         self.client.event(HardwareSerial {
             self_id: self.id,
-            hardware_serial_hi: (serial >> 32) as _,
-            hardware_serial_lo: serial as _,
+            hardware_serial: serial,
         });
     }
 
     pub fn send_hardware_id_wacom(&self, id: u64) {
         self.client.event(HardwareIdWacom {
             self_id: self.id,
-            hardware_id_hi: (id >> 32) as _,
-            hardware_id_lo: id as _,
+            hardware_id: id,
         });
     }
 
diff --git a/src/ifs/wl_seat/zwp_relative_pointer_v1.rs b/src/ifs/wl_seat/zwp_relative_pointer_v1.rs
index 92234bad..4c34667e 100644
--- a/src/ifs/wl_seat/zwp_relative_pointer_v1.rs
+++ b/src/ifs/wl_seat/zwp_relative_pointer_v1.rs
@@ -31,8 +31,7 @@ impl ZwpRelativePointerV1 {
         logical_to_client_wire_scale!(self.client, dx, dy);
         self.client.event(RelativeMotion {
             self_id: self.id,
-            utime_hi: (time_usec >> 32) as u32,
-            utime_lo: time_usec as u32,
+            utime: time_usec,
             dx,
             dy,
             dx_unaccelerated,
diff --git a/src/ifs/wl_surface/wp_commit_timer_v1.rs b/src/ifs/wl_surface/wp_commit_timer_v1.rs
index 064284ac..abc465cf 100644
--- a/src/ifs/wl_surface/wp_commit_timer_v1.rs
+++ b/src/ifs/wl_surface/wp_commit_timer_v1.rs
@@ -48,7 +48,8 @@ impl WpCommitTimerV1RequestHandler for WpCommitTimerV1 {
         if req.tv_nsec >= 1_000_000_000 {
             return Err(WpCommitTimerV1Error::InvalidNsec);
         }
-        let nsec = (((req.tv_sec_hi as u64) << 32) | (req.tv_sec_lo as u64))
+        let nsec = req
+            .tv_sec
             .checked_mul(1_000_000_000)
             .and_then(|n| n.checked_add(req.tv_nsec as u64));
         let Some(nsec) = nsec else {
diff --git a/src/ifs/wl_surface/wp_linux_drm_syncobj_surface_v1.rs b/src/ifs/wl_surface/wp_linux_drm_syncobj_surface_v1.rs
index fea9caab..ffe9759b 100644
--- a/src/ifs/wl_surface/wp_linux_drm_syncobj_surface_v1.rs
+++ b/src/ifs/wl_surface/wp_linux_drm_syncobj_surface_v1.rs
@@ -57,24 +57,20 @@ impl WpLinuxDrmSyncobjSurfaceV1RequestHandler for WpLinuxDrmSyncobjSurfaceV1 {
     }
 
     fn set_acquire_point(&self, req: SetAcquirePoint, _slf: &Rc<Self>) -> Result<(), Self::Error> {
-        let point = point(req.point_hi, req.point_lo);
+        let point = SyncObjPoint(req.point);
         let timeline = self.client.lookup(req.timeline)?;
         self.surface.pending.borrow_mut().acquire_point = Some((timeline.sync_obj.clone(), point));
         Ok(())
     }
 
     fn set_release_point(&self, req: SetReleasePoint, _slf: &Rc<Self>) -> Result<(), Self::Error> {
-        let point = point(req.point_hi, req.point_lo);
+        let point = SyncObjPoint(req.point);
         let timeline = self.client.lookup(req.timeline)?;
         self.surface.pending.borrow_mut().release_point = Some((timeline.sync_obj.clone(), point));
         Ok(())
     }
 }
 
-fn point(hi: u32, lo: u32) -> SyncObjPoint {
-    SyncObjPoint(((hi as u64) << 32) | (lo as u64))
-}
-
 object_base! {
     self = WpLinuxDrmSyncobjSurfaceV1;
     version = self.version;
diff --git a/src/ifs/wl_surface/x_surface/xwayland_surface_v1.rs b/src/ifs/wl_surface/x_surface/xwayland_surface_v1.rs
index 71a87d23..e690f9df 100644
--- a/src/ifs/wl_surface/x_surface/xwayland_surface_v1.rs
+++ b/src/ifs/wl_surface/x_surface/xwayland_surface_v1.rs
@@ -26,7 +26,7 @@ impl XwaylandSurfaceV1RequestHandler for XwaylandSurfaceV1 {
         if self.x.surface.xwayland_serial.is_some() {
             return Err(XwaylandSurfaceV1Error::SerialAlreadySet);
         }
-        let serial = req.serial_lo as u64 | ((req.serial_hi as u64) << 32);
+        let serial = req.serial;
         if self.client.last_xwayland_serial.get() >= serial {
             return Err(XwaylandSurfaceV1Error::NonMonotonicSerial);
         }
diff --git a/src/ifs/wp_presentation_feedback.rs b/src/ifs/wp_presentation_feedback.rs
index 109ed7a3..245ae8e6 100644
--- a/src/ifs/wp_presentation_feedback.rs
+++ b/src/ifs/wp_presentation_feedback.rs
@@ -37,12 +37,10 @@ impl WpPresentationFeedback {
     pub fn send_presented(&self, tv_sec: u64, tv_nsec: u32, refresh: u32, seq: u64, flags: u32) {
         self.client.event(Presented {
             self_id: self.id,
-            tv_sec_hi: (tv_sec >> 32) as u32,
-            tv_sec_lo: tv_sec as u32,
+            tv_sec,
             tv_nsec,
             refresh,
-            seq_hi: (seq >> 32) as u32,
-            seq_lo: seq as u32,
+            seq,
             flags,
         });
     }
diff --git a/src/ifs/zwlr_screencopy_frame_v1.rs b/src/ifs/zwlr_screencopy_frame_v1.rs
index 982e88ed..99165861 100644
--- a/src/ifs/zwlr_screencopy_frame_v1.rs
+++ b/src/ifs/zwlr_screencopy_frame_v1.rs
@@ -38,8 +38,7 @@ impl ZwlrScreencopyFrameV1 {
     pub fn send_ready(&self, tv_sec: u64, tv_nsec: u32) {
         self.client.event(Ready {
             self_id: self.id,
-            tv_sec_hi: (tv_sec >> 32) as u32,
-            tv_sec_lo: tv_sec as u32,
+            tv_sec,
             tv_nsec,
         });
     }
diff --git a/src/ifs/zwp_linux_buffer_params_v1.rs b/src/ifs/zwp_linux_buffer_params_v1.rs
index cfff2d97..e91794d3 100644
--- a/src/ifs/zwp_linux_buffer_params_v1.rs
+++ b/src/ifs/zwp_linux_buffer_params_v1.rs
@@ -133,7 +133,7 @@ impl ZwpLinuxBufferParamsV1RequestHandler for ZwpLinuxBufferParamsV1 {
     }
 
     fn add(&self, req: Add, _slf: &Rc<Self>) -> Result<(), Self::Error> {
-        let modifier = ((req.modifier_hi as u64) << 32) | req.modifier_lo as u64;
+        let modifier = req.modifier;
         match self.modifier.get() {
             Some(m) if m != modifier => {
                 return Err(ZwpLinuxBufferParamsV1Error::MixedModifiers(modifier, m));
diff --git a/src/ifs/zwp_linux_dmabuf_v1.rs b/src/ifs/zwp_linux_dmabuf_v1.rs
index 5812022d..4282ed25 100644
--- a/src/ifs/zwp_linux_dmabuf_v1.rs
+++ b/src/ifs/zwp_linux_dmabuf_v1.rs
@@ -94,8 +94,7 @@ impl ZwpLinuxDmabufV1 {
         self.client.event(Modifier {
             self_id: self.id,
             format,
-            modifier_hi: (modifier >> 32) as _,
-            modifier_lo: modifier as _,
+            modifier,
         })
     }
 
diff --git a/src/it/test_ifs/test_screenshot.rs b/src/it/test_ifs/test_screenshot.rs
index f4c70a4d..580d616a 100644
--- a/src/it/test_ifs/test_screenshot.rs
+++ b/src/it/test_ifs/test_screenshot.rs
@@ -36,7 +36,7 @@ impl TestJayScreenshot {
             width: ev.width as _,
             height: ev.height as _,
             format: XRGB8888,
-            modifier: ((ev.modifier_hi as u64) << 32) | (ev.modifier_lo as u64),
+            modifier: ev.modifier,
             planes,
         })));
         Ok(())
diff --git a/src/it/test_ifs/test_syncobj_surface.rs b/src/it/test_ifs/test_syncobj_surface.rs
index b0b27a15..ca2c3105 100644
--- a/src/it/test_ifs/test_syncobj_surface.rs
+++ b/src/it/test_ifs/test_syncobj_surface.rs
@@ -27,8 +27,7 @@ impl TestSyncobjSurface {
         self.tran.send(SetAcquirePoint {
             self_id: self.id,
             timeline: tl.id,
-            point_hi: (point >> 32) as _,
-            point_lo: point as _,
+            point,
         })?;
         Ok(())
     }
@@ -37,8 +36,7 @@ impl TestSyncobjSurface {
         self.tran.send(SetReleasePoint {
             self_id: self.id,
             timeline: tl.id,
-            point_hi: (point >> 32) as _,
-            point_lo: point as _,
+            point,
         })?;
         Ok(())
     }
diff --git a/src/utils/buffd/formatter.rs b/src/utils/buffd/formatter.rs
index 35f07e7f..9e56dc06 100644
--- a/src/utils/buffd/formatter.rs
+++ b/src/utils/buffd/formatter.rs
@@ -43,6 +43,16 @@ impl<'a> MsgFormatter<'a> {
         self
     }
 
+    pub fn u64(&mut self, int: u64) -> &mut Self {
+        self.uint((int >> 32) as u32);
+        self.uint(int as u32)
+    }
+
+    pub fn u64_rev(&mut self, int: u64) -> &mut Self {
+        self.uint(int as u32);
+        self.uint((int >> 32) as u32)
+    }
+
     pub fn fixed(&mut self, fixed: Fixed) -> &mut Self {
         self.write(uapi::as_bytes(&fixed.0));
         self
diff --git a/src/utils/buffd/parser.rs b/src/utils/buffd/parser.rs
index 4c638e75..a8e92c67 100644
--- a/src/utils/buffd/parser.rs
+++ b/src/utils/buffd/parser.rs
@@ -52,6 +52,18 @@ impl<'a, 'b> MsgParser<'a, 'b> {
         self.int().map(|i| i as u32)
     }
 
+    pub fn u64(&mut self) -> Result<u64, MsgParserError> {
+        let hi = self.uint()?;
+        let lo = self.uint()?;
+        Ok(((hi as u64) << 32) | lo as u64)
+    }
+
+    pub fn u64_rev(&mut self) -> Result<u64, MsgParserError> {
+        let lo = self.uint()?;
+        let hi = self.uint()?;
+        Ok(((hi as u64) << 32) | lo as u64)
+    }
+
     pub fn object<T>(&mut self) -> Result<T, MsgParserError>
     where
         ObjectId: Into<T>,
diff --git a/src/wl_usr/usr_ifs/usr_linux_buffer_params.rs b/src/wl_usr/usr_ifs/usr_linux_buffer_params.rs
index a9e9551f..8b9f8a1d 100644
--- a/src/wl_usr/usr_ifs/usr_linux_buffer_params.rs
+++ b/src/wl_usr/usr_ifs/usr_linux_buffer_params.rs
@@ -33,8 +33,7 @@ impl UsrLinuxBufferParams {
                 plane_idx: idx as _,
                 offset: plane.offset,
                 stride: plane.stride,
-                modifier_hi: (buf.modifier >> 32) as _,
-                modifier_lo: buf.modifier as _,
+                modifier: buf.modifier,
             });
         }
         self.con.request(Create {
diff --git a/src/wl_usr/usr_ifs/usr_linux_dmabuf.rs b/src/wl_usr/usr_ifs/usr_linux_dmabuf.rs
index e3e0a0e5..436a4fda 100644
--- a/src/wl_usr/usr_ifs/usr_linux_dmabuf.rs
+++ b/src/wl_usr/usr_ifs/usr_linux_dmabuf.rs
@@ -55,10 +55,7 @@ impl ZwpLinuxDmabufV1EventHandler for UsrLinuxDmabuf {
     fn modifier(&self, ev: Modifier, _slf: &Rc<Self>) -> Result<(), Self::Error> {
         if let Some(owner) = self.owner.get() {
             if let Some(format) = formats().get(&ev.format) {
-                owner.modifier(
-                    format,
-                    ((ev.modifier_hi as u64) << 32) | (ev.modifier_lo as u64),
-                );
+                owner.modifier(format, ev.modifier);
             }
         }
         Ok(())
diff --git a/wire/ext_image_copy_capture_frame_v1.txt b/wire/ext_image_copy_capture_frame_v1.txt
index 6703e54b..4490e1d6 100644
--- a/wire/ext_image_copy_capture_frame_v1.txt
+++ b/wire/ext_image_copy_capture_frame_v1.txt
@@ -29,8 +29,7 @@ event damage {
 }
 
 event presentation_time {
-    tv_sec_hi: u32,
-    tv_sec_lo: u32,
+    tv_sec: u64,
     tv_nsec: u32,
 }
 
diff --git a/wire/jay_screenshot.txt b/wire/jay_screenshot.txt
index ba6432e1..85cc0899 100644
--- a/wire/jay_screenshot.txt
+++ b/wire/jay_screenshot.txt
@@ -7,8 +7,7 @@ event dmabuf {
     height: u32,
     offset: u32,
     stride: u32,
-    modifier_lo: u32,
-    modifier_hi: u32,
+    modifier: u64_rev,
 }
 
 event error {
diff --git a/wire/wp_commit_timer_v1.txt b/wire/wp_commit_timer_v1.txt
index 3a98bee6..4b6a2305 100644
--- a/wire/wp_commit_timer_v1.txt
+++ b/wire/wp_commit_timer_v1.txt
@@ -1,6 +1,5 @@
 request set_timestamp {
-    tv_sec_hi: u32,
-    tv_sec_lo: u32,
+    tv_sec: u64,
     tv_nsec: u32,
 }
 
diff --git a/wire/wp_linux_drm_syncobj_surface_v1.txt b/wire/wp_linux_drm_syncobj_surface_v1.txt
index da7bb68b..a4dac48f 100644
--- a/wire/wp_linux_drm_syncobj_surface_v1.txt
+++ b/wire/wp_linux_drm_syncobj_surface_v1.txt
@@ -6,12 +6,10 @@ request destroy {
 
 request set_acquire_point {
     timeline: id(wp_linux_drm_syncobj_timeline_v1),
-    point_hi: u32,
-    point_lo: u32,
+    point: u64,
 }
 
 request set_release_point {
     timeline: id(wp_linux_drm_syncobj_timeline_v1),
-    point_hi: u32,
-    point_lo: u32,
+    point: u64,
 }
diff --git a/wire/wp_presentation_feedback.txt b/wire/wp_presentation_feedback.txt
index b6635dee..5cc70855 100644
--- a/wire/wp_presentation_feedback.txt
+++ b/wire/wp_presentation_feedback.txt
@@ -5,12 +5,10 @@ event sync_output {
 }
 
 event presented {
-    tv_sec_hi   : u32,
-    tv_sec_lo   : u32,
+    tv_sec      : u64,
     tv_nsec     : u32,
     refresh     : u32,
-    seq_hi      : u32,
-    seq_lo      : u32,
+    seq         : u64,
     flags       : u32,
 }
 
diff --git a/wire/xwayland_surface_v1.txt b/wire/xwayland_surface_v1.txt
index 1cc40cc9..42c19019 100644
--- a/wire/xwayland_surface_v1.txt
+++ b/wire/xwayland_surface_v1.txt
@@ -1,8 +1,7 @@
 # requests
 
 request set_serial {
-    serial_lo: u32,
-    serial_hi: u32,
+    serial: u64_rev,
 }
 
 request destroy { }
diff --git a/wire/zwlr_screencopy_frame_v1.txt b/wire/zwlr_screencopy_frame_v1.txt
index b1336c31..7467a2cc 100644
--- a/wire/zwlr_screencopy_frame_v1.txt
+++ b/wire/zwlr_screencopy_frame_v1.txt
@@ -25,8 +25,7 @@ event flags {
 }
 
 event ready {
-    tv_sec_hi: u32,
-    tv_sec_lo: u32,
+    tv_sec: u64,
     tv_nsec: u32,
 }
 
diff --git a/wire/zwp_linux_buffer_params_v1.txt b/wire/zwp_linux_buffer_params_v1.txt
index a231c9e0..947362b3 100644
--- a/wire/zwp_linux_buffer_params_v1.txt
+++ b/wire/zwp_linux_buffer_params_v1.txt
@@ -7,8 +7,7 @@ request add {
     plane_idx: u32,
     offset: u32,
     stride: u32,
-    modifier_hi: u32,
-    modifier_lo: u32,
+    modifier: u64,
 }
 
 request create {
diff --git a/wire/zwp_linux_dmabuf_v1.txt b/wire/zwp_linux_dmabuf_v1.txt
index 9b6e9052..794ff334 100644
--- a/wire/zwp_linux_dmabuf_v1.txt
+++ b/wire/zwp_linux_dmabuf_v1.txt
@@ -23,6 +23,5 @@ event format {
 
 event modifier (since = 3) {
     format: u32,
-    modifier_hi: u32,
-    modifier_lo: u32,
+    modifier: u64,
 }
diff --git a/wire/zwp_relative_pointer_v1.txt b/wire/zwp_relative_pointer_v1.txt
index 8df681e2..71fd8bf7 100644
--- a/wire/zwp_relative_pointer_v1.txt
+++ b/wire/zwp_relative_pointer_v1.txt
@@ -7,8 +7,7 @@ request destroy {
 # events
 
 event relative_motion {
-    utime_hi: u32,
-    utime_lo: u32,
+    utime: u64,
     dx: fixed,
     dy: fixed,
     dx_unaccelerated: fixed,
diff --git a/wire/zwp_tablet_tool_v2.txt b/wire/zwp_tablet_tool_v2.txt
index 9351dc80..ea611667 100644
--- a/wire/zwp_tablet_tool_v2.txt
+++ b/wire/zwp_tablet_tool_v2.txt
@@ -13,13 +13,11 @@ event type {
 }
 
 event hardware_serial {
-    hardware_serial_hi: u32,
-    hardware_serial_lo: u32,
+    hardware_serial: u64,
 }
 
 event hardware_id_wacom {
-    hardware_id_hi: u32,
-    hardware_id_lo: u32,
+    hardware_id: u64,
 }
 
 event capability {