diff --git a/src/js/controller/piskel/PiskelController.js b/src/js/controller/piskel/PiskelController.js
index 3e2fe4198..c5d3cf895 100644
--- a/src/js/controller/piskel/PiskelController.js
+++ b/src/js/controller/piskel/PiskelController.js
@@ -214,7 +214,10 @@
           return index + 1;
         }
       }
-    });
+
+      return index;
+    }).sort();
+
   };
 
   ns.PiskelController.prototype.hasVisibleFrameAt = function (index) {