diff --git a/src/gameobjects/particles/EmitterOp.js b/src/gameobjects/particles/EmitterOp.js
index c66dfa17b..d8b477edd 100644
--- a/src/gameobjects/particles/EmitterOp.js
+++ b/src/gameobjects/particles/EmitterOp.js
@@ -265,7 +265,7 @@ var EmitterOp = new Class({
      */
     toJSON: function ()
     {
-        return JSON.stringify(this.propertyValue);
+        return this.propertyValue;
     },
 
     /**