diff --git a/assets/resources/scriptlets.js b/assets/resources/scriptlets.js
index 78ae17cd7..7fc87fac3 100644
--- a/assets/resources/scriptlets.js
+++ b/assets/resources/scriptlets.js
@@ -808,6 +808,7 @@
                 return this.v;
             },
             setter: function(a) {
+                if ( a === this.v ) { return; }
                 this.v = a;
                 if ( a instanceof Object ) {
                     trapChain(a, chain);