diff --git a/Userland/Services/WindowServer/WindowClient.ipc b/Userland/Services/WindowServer/WindowClient.ipc
index f2c7c9c899..c7ffb91a5b 100644
--- a/Userland/Services/WindowServer/WindowClient.ipc
+++ b/Userland/Services/WindowServer/WindowClient.ipc
@@ -18,7 +18,7 @@ endpoint WindowClient = 4
     WindowCloseRequest(i32 window_id) =|
     WindowResized(i32 window_id, Gfx::IntRect new_rect) =|
 
-    MenuItemActivated(i32 menu_id, i32 identifier) =|
+    MenuItemActivated(i32 menu_id, u32 identifier) =|
     MenuItemEntered(i32 menu_id, u32 identifier) =|
     MenuItemLeft(i32 menu_id, u32 identifier) =|
     MenuVisibilityDidChange(i32 menu_id, bool visible) =|