diff --git a/CHANGELOG b/CHANGELOG
index a16d7a7..b995849 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Fix issue where Function#argumentNames returned incorrect results in IE when comments were intermixed with argument names. (Christophe Porteneuve, T.J. Crowder)
+
 * Performance improvements in Function methods (Samuel Lebeau, kangax, jddalton, Tobie Langel).
 
 *1.6.0.3* (September 29, 2008)
diff --git a/src/lang/function.js b/src/lang/function.js
index df2f737..e73a01e 100644
--- a/src/lang/function.js
+++ b/src/lang/function.js
@@ -13,7 +13,8 @@ Object.extend(Function.prototype, (function() {
   }
   
   function argumentNames() {
-    var names = this.toString().match(/^[\s\(]*function[^(]*\(([^\)]*)\)/)[1]
+    var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1]
+      .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')
       .replace(/\s+/g, '').split(',');
     return names.length == 1 && !names[0] ? [] : names;
   }