diff --git a/openbox/grab.c b/openbox/grab.c
index e934959d..dc743026 100644
--- a/openbox/grab.c
+++ b/openbox/grab.c
@@ -5,7 +5,7 @@
 #include <glib.h>
 #include <X11/Xlib.h>
 
-#define GRAB_PTR_MASK (ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
+#define GRAB_PTR_MASK (ButtonPressMask | ButtonReleaseMask | PointerMotionMask)
 #define GRAB_KEY_MASK (KeyPressMask | KeyReleaseMask)
 
 #define MASK_LIST_SIZE 8