diff --git a/core/client/assets/lib/touch-editor.js b/core/client/assets/lib/touch-editor.js
index e078a59d9c..aba80033f8 100644
--- a/core/client/assets/lib/touch-editor.js
+++ b/core/client/assets/lib/touch-editor.js
@@ -46,7 +46,8 @@ var createTouchEditor = function createTouchEditor() {
         nthLine: noop,
         refresh: noop,
         selectLines: noop,
-        on: noop
+        on: noop,
+        off: noop
     };
 
     return TouchEditor;