diff --git a/lib/ace/commands/occur_commands.js b/lib/ace/commands/occur_commands.js
index 1d4a97ec..1fbcad77 100644
--- a/lib/ace/commands/occur_commands.js
+++ b/lib/ace/commands/occur_commands.js
@@ -85,7 +85,7 @@ oop.inherits(OccurKeyboardHandler, HashHandler);
     var handleKeyboard$super = this.handleKeyboard;
     this.handleKeyboard = function(data, hashId, key, keyCode) {
         var cmd = handleKeyboard$super.call(this, data, hashId, key, keyCode);
-        return (cmd && cmd.command) ? cmd : {command: "null", passEvent: true};
+        return (cmd && cmd.command) ? cmd : undefined;
     }
 
 }).call(OccurKeyboardHandler.prototype);