diff --git a/js/ui/panel.js b/js/ui/panel.js
index 7153abdff..f24f3a402 100644
--- a/js/ui/panel.js
+++ b/js/ui/panel.js
@@ -1065,6 +1065,9 @@ const Panel = new Lang.Class({
     },
 
     _onButtonPress: function(actor, event) {
+        if (Main.modalCount > 0)
+            return false;
+
         if (event.get_source() != actor)
             return false;