diff --git a/application/portalwebpage.class.inc.php b/application/portalwebpage.class.inc.php
index 93b86f180..5e96226df 100644
--- a/application/portalwebpage.class.inc.php
+++ b/application/portalwebpage.class.inc.php
@@ -260,7 +260,7 @@ EOF
 	{
 		var form = $('FORM');
 		form.unbind('submit'); // De-activate validation
-		window.location.href = window.location.href.replace(/[&?]operation=[^&]*/, '');
+		window.location.href = window.location.href.replace(/operation=[^&]*&?/, '');
 		return false;
 	}