diff --git a/third_party/shims_for_IE.js b/third_party/shims_for_IE.js
index 47317a85b8..72891da672 100644
--- a/third_party/shims_for_IE.js
+++ b/third_party/shims_for_IE.js
@@ -6,11 +6,7 @@ if (!Object.hasOwnProperty('name')) {
   Object.defineProperty(Function.prototype, 'name', {
     get: function() {
       var matches = this.toString().match(/^\s*function\s*((?![0-9])[a-zA-Z0-9_$]*)\s*\(/);
-      var name = matches && matches.length > 1 ? matches[1] : "";
-      // For better performance only parse once, and then cache the
-      // result through a new accessor for repeated access.
-      Object.defineProperty(this, 'name', {value: name});
-      return name;
+      return matches && matches.length > 1 ? matches[1] : '';
     }
   });
 }