diff --git a/lib/WebGUI/Session/Url.pm b/lib/WebGUI/Session/Url.pm
index 0b03a2deb..c99896c97 100644
--- a/lib/WebGUI/Session/Url.pm
+++ b/lib/WebGUI/Session/Url.pm
@@ -174,7 +174,7 @@ sub gateway {
         my $url = $self->session->config->get("gateway").'/'.$pageUrl;
 	$url =~ s/\/+/\//g;
         if ($self->session->setting->get("preventProxyCache") == 1 and !$skipPreventProxyCache) {
-                $url = $self->append($url,"noCache=".randint(0,1000).','.$self->session->datetime->time());
+                $url = $self->append($url,"noCache=".randint(0,1000).':'.$self->session->datetime->time());
         }
 	if ($pairs) {
 		$url = $self->append($url,$pairs);