diff --git a/src/definitions/modules/transition.js b/src/definitions/modules/transition.js
index 055088b03..753c70624 100755
--- a/src/definitions/modules/transition.js
+++ b/src/definitions/modules/transition.js
@@ -764,6 +764,7 @@ $.fn.transition = function() {
   ;
 };
 
+// Records if CSS transition is available
 $.fn.transition.exists = {};
 
 $.fn.transition.settings = {