diff --git a/openbox/client.c b/openbox/client.c
index b3f13684..c68cd479 100644
--- a/openbox/client.c
+++ b/openbox/client.c
@@ -3349,7 +3349,7 @@ gboolean client_focus(ObClient *self)
        interactive actions should not do anything that can move focus until
        their finishing.
     */
-    g_assert(keyboard_interactively_grabbed());
+    g_assert(!keyboard_interactively_grabbed());
 
     error = FALSE;
     xerror_set_ignore(TRUE);