diff --git a/src/ifs/wl_surface/xdg_surface.rs b/src/ifs/wl_surface/xdg_surface.rs
index 55580ab3..a24da62d 100644
--- a/src/ifs/wl_surface/xdg_surface.rs
+++ b/src/ifs/wl_surface/xdg_surface.rs
@@ -8,7 +8,7 @@ use {
             wl_surface::{
                 xdg_surface::{
                     xdg_popup::{XdgPopup, XdgPopupError},
-                    xdg_toplevel::XdgToplevel,
+                    xdg_toplevel::{XdgToplevel, WM_CAPABILITIES_SINCE},
                 },
                 CommitAction, CommitContext, SurfaceExt, SurfaceRole, WlSurface, WlSurfaceError,
             },
@@ -217,6 +217,9 @@ impl XdgSurface {
         track!(self.surface.client, toplevel);
         self.surface.client.add_client_obj(&toplevel)?;
         self.ext.set(Some(toplevel.clone()));
+        if self.base.version >= WM_CAPABILITIES_SINCE {
+            toplevel.send_wm_capabilities();
+        }
         self.surface.set_toplevel(Some(toplevel));
         Ok(())
     }
diff --git a/src/ifs/wl_surface/xdg_surface/xdg_toplevel.rs b/src/ifs/wl_surface/xdg_surface/xdg_toplevel.rs
index 4fec5444..7ed7f77d 100644
--- a/src/ifs/wl_surface/xdg_surface/xdg_toplevel.rs
+++ b/src/ifs/wl_surface/xdg_surface/xdg_toplevel.rs
@@ -61,6 +61,16 @@ const STATE_TILED_RIGHT: u32 = 6;
 const STATE_TILED_TOP: u32 = 7;
 const STATE_TILED_BOTTOM: u32 = 8;
 
+#[allow(dead_code)]
+const CAP_WINDOW_MENU: u32 = 1;
+#[allow(dead_code)]
+const CAP_MAXIMIZE: u32 = 2;
+const CAP_FULLSCREEN: u32 = 3;
+#[allow(dead_code)]
+const CAP_MINIMIZE: u32 = 4;
+
+pub const WM_CAPABILITIES_SINCE: u32 = 5;
+
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
 pub enum Decoration {
     #[allow(dead_code)]
@@ -164,6 +174,13 @@ impl XdgToplevel {
         })
     }
 
+    pub fn send_wm_capabilities(&self) {
+        self.xdg.surface.client.event(WmCapabilities {
+            self_id: self.id,
+            capabilities: &[CAP_FULLSCREEN],
+        })
+    }
+
     fn destroy(self: &Rc<Self>, parser: MsgParser<'_, '_>) -> Result<(), XdgToplevelError> {
         let _req: Destroy = self.xdg.surface.client.parse(self.deref(), parser)?;
         self.tl_destroy();
diff --git a/src/ifs/xdg_wm_base.rs b/src/ifs/xdg_wm_base.rs
index b4fd8160..551b7514 100644
--- a/src/ifs/xdg_wm_base.rs
+++ b/src/ifs/xdg_wm_base.rs
@@ -117,7 +117,7 @@ impl Global for XdgWmBaseGlobal {
     }
 
     fn version(&self) -> u32 {
-        3
+        5
     }
 }
 
diff --git a/wire/xdg_toplevel.txt b/wire/xdg_toplevel.txt
index 82140b09..fdbbd70f 100644
--- a/wire/xdg_toplevel.txt
+++ b/wire/xdg_toplevel.txt
@@ -72,3 +72,7 @@ msg configure_bounds = 2 {
     width: i32,
     height: i32,
 }
+
+msg wm_capabilities = 3 {
+    capabilities: array(u32),
+}