diff --git a/src/servers/app/WindowLayer.h b/src/servers/app/WindowLayer.h
index f4f73c4dae..b4a01751de 100644
--- a/src/servers/app/WindowLayer.h
+++ b/src/servers/app/WindowLayer.h
@@ -263,6 +263,7 @@ class WindowLayer {
 			::Desktop*			fDesktop;
 
 			BPoint				fLastMousePosition;
+			bigtime_t			fLastMoveTime;
 
 			// The synchronization, which client drawing commands
 			// belong to the redraw of which dirty region is handled