diff --git a/src/ajax.js b/src/ajax.js
index 8262bc7a..91043ded 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -267,6 +267,9 @@ jQuery.extend({
 						done = true;
 						success();
 						complete();
+
+						// Handle memory leak in IE
+						script.onload = script.onreadystatechange = null;
 						head.removeChild( script );
 					}
 				};