diff --git a/src/backend.rs b/src/backend.rs
index b618fcbd..30daa384 100644
--- a/src/backend.rs
+++ b/src/backend.rs
@@ -176,7 +176,7 @@ pub enum InputEvent {
         state: KeyState,
     },
 
-    AxisSmooth {
+    AxisPx {
         dist: Fixed,
         axis: ScrollAxis,
     },
diff --git a/src/backends/metal/input.rs b/src/backends/metal/input.rs
index 86fd82f3..2c30595d 100644
--- a/src/backends/metal/input.rs
+++ b/src/backends/metal/input.rs
@@ -151,7 +151,7 @@ impl MetalBackend {
                     axis,
                 }
             } else {
-                InputEvent::AxisSmooth {
+                InputEvent::AxisPx {
                     dist: Fixed::from_f64(scroll),
                     axis,
                 }
diff --git a/src/ifs/wl_seat/event_handling.rs b/src/ifs/wl_seat/event_handling.rs
index 47c0077a..279f6497 100644
--- a/src/ifs/wl_seat/event_handling.rs
+++ b/src/ifs/wl_seat/event_handling.rs
@@ -195,7 +195,7 @@ impl WlSeatGlobal {
 
             InputEvent::AxisSource { source } => self.pointer_owner.axis_source(source),
             InputEvent::Axis120 { dist, axis } => self.pointer_owner.axis_120(dist, axis),
-            InputEvent::AxisSmooth { dist, axis } => self.pointer_owner.axis_smooth(dist, axis),
+            InputEvent::AxisPx { dist, axis } => self.pointer_owner.axis_px(dist, axis),
             InputEvent::AxisStop { axis } => self.pointer_owner.axis_stop(axis),
             InputEvent::AxisFrame { time_usec } => self.pointer_owner.frame(dev, self, time_usec),
         }
@@ -564,7 +564,7 @@ impl WlSeatGlobal {
                     }
                     let px = (delta as f64 / AXIS_120 as f64) * dev.px_per_scroll_wheel.get();
                     p.send_axis(time, axis, Fixed::from_f64(px));
-                } else if let Some(delta) = event.smooth[i].get() {
+                } else if let Some(delta) = event.px[i].get() {
                     p.send_axis(time, axis, delta);
                 }
                 if p.seat.version >= AXIS_STOP_SINCE_VERSION && event.stop[i].get() {
diff --git a/src/ifs/wl_seat/pointer_owner.rs b/src/ifs/wl_seat/pointer_owner.rs
index fce723e3..0008cbbe 100644
--- a/src/ifs/wl_seat/pointer_owner.rs
+++ b/src/ifs/wl_seat/pointer_owner.rs
@@ -44,8 +44,8 @@ impl PointerOwnerHolder {
         self.pending_scroll.v120[axis as usize].set(Some(delta));
     }
 
-    pub fn axis_smooth(&self, delta: Fixed, axis: ScrollAxis) {
-        self.pending_scroll.smooth[axis as usize].set(Some(delta));
+    pub fn axis_px(&self, delta: Fixed, axis: ScrollAxis) {
+        self.pending_scroll.px[axis as usize].set(Some(delta));
     }
 
     pub fn axis_stop(&self, axis: ScrollAxis) {
diff --git a/src/ifs/wl_seat/wl_pointer.rs b/src/ifs/wl_seat/wl_pointer.rs
index ca33efb9..8677602e 100644
--- a/src/ifs/wl_seat/wl_pointer.rs
+++ b/src/ifs/wl_seat/wl_pointer.rs
@@ -38,7 +38,7 @@ pub const AXIS_VALUE120_SINCE_VERSION: u32 = 8;
 #[derive(Default, Debug)]
 pub struct PendingScroll {
     pub v120: [Cell<Option<i32>>; 2],
-    pub smooth: [Cell<Option<Fixed>>; 2],
+    pub px: [Cell<Option<Fixed>>; 2],
     pub stop: [Cell<bool>; 2],
     pub source: Cell<Option<u32>>,
     pub time_usec: Cell<u64>,
@@ -51,10 +51,7 @@ impl PendingScroll {
                 Cell::new(self.v120[0].take()),
                 Cell::new(self.v120[1].take()),
             ],
-            smooth: [
-                Cell::new(self.smooth[0].take()),
-                Cell::new(self.smooth[1].take()),
-            ],
+            px: [Cell::new(self.px[0].take()), Cell::new(self.px[1].take())],
             stop: [
                 Cell::new(self.stop[0].take()),
                 Cell::new(self.stop[1].take()),
diff --git a/src/it/test_backend.rs b/src/it/test_backend.rs
index 089c91ce..2b7b0dc3 100644
--- a/src/it/test_backend.rs
+++ b/src/it/test_backend.rs
@@ -318,9 +318,9 @@ impl TestBackendMouse {
 
     pub fn scroll_px(&self, dy: i32) {
         self.common.event(InputEvent::AxisSource {
-            source: AxisSource::Wheel,
+            source: AxisSource::Finger,
         });
-        self.common.event(InputEvent::AxisSmooth {
+        self.common.event(InputEvent::AxisPx {
             dist: Fixed::from_int(dy),
             axis: ScrollAxis::Vertical,
         });
diff --git a/src/utils/scroller.rs b/src/utils/scroller.rs
index 85f6080c..0429b1d3 100644
--- a/src/utils/scroller.rs
+++ b/src/utils/scroller.rs
@@ -12,31 +12,31 @@ use {
 #[derive(Default)]
 pub struct Scroller {
     v120: Cell<i32>,
-    smooth: Cell<f64>,
+    px: Cell<f64>,
 }
 
 impl Scroller {
     pub fn handle(&self, scroll: &PendingScroll) -> Option<i32> {
         let n = if let Some(d) = scroll.v120[VERTICAL_SCROLL as usize].get() {
-            self.smooth.set(0.0);
+            self.px.set(0.0);
             let mut v120 = self.v120.get() + d;
             let discrete = v120 / AXIS_120;
             v120 -= discrete * AXIS_120;
             self.v120.set(v120);
             discrete
-        } else if let Some(smooth) = scroll.smooth[VERTICAL_SCROLL as usize].get() {
+        } else if let Some(px) = scroll.px[VERTICAL_SCROLL as usize].get() {
             self.v120.set(0);
-            let mut smooth = self.smooth.get() + smooth.to_f64();
-            let discrete = (smooth / PX_PER_SCROLL).trunc();
-            smooth -= discrete * PX_PER_SCROLL;
-            self.smooth.set(smooth);
+            let mut px = self.px.get() + px.to_f64();
+            let discrete = (px / PX_PER_SCROLL).trunc();
+            px -= discrete * PX_PER_SCROLL;
+            self.px.set(px);
             discrete as _
         } else {
             0
         };
         if scroll.stop[VERTICAL_SCROLL as usize].get() {
             self.v120.set(0);
-            self.smooth.set(0.0);
+            self.px.set(0.0);
         }
         if n != 0 {
             Some(n)