diff --git a/lib/util.js b/lib/util.js
index 5d4edfe..265d545 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -69,7 +69,7 @@ exports.defineSecureProp = function( obj, prop, value )
 {
     if ( Object.defineProperty === undefined )
     {
-        func[ prop ] = value;
+        obj[ prop ] = value;
     }
     else
     {