diff --git a/openbox/event.c b/openbox/event.c
index 9eaec027..bb249086 100644
--- a/openbox/event.c
+++ b/openbox/event.c
@@ -343,6 +343,9 @@ static gboolean wanted_focusevent(XEvent *e, gboolean in_client_only)
         /* This means focus was taken by a keyboard/mouse grab. */
         if (mode == NotifyGrab)
             return FALSE;
+        /* This means focus was grabbed on a window and it was released. */
+        if (mode == NotifyUngrab)
+            return FALSE;
 
         /* Focus left the root window revertedto state */
         if (win == RootWindow(ob_display, ob_screen))