diff --git a/js/transition.js b/js/transition.js
index 6dfd4298c2..fac318af90 100644
--- a/js/transition.js
+++ b/js/transition.js
@@ -27,6 +27,8 @@
         return { end: transEndEventNames[name] }
       }
     }
+
+    return false // explicit for ie8 (  ._.)
   }
 
   // http://blog.alexmaccaw.com/css-transitions