Index: singlesignon.module
===================================================================
--- singlesignon.module	(revision 9928)
+++ singlesignon.module	(working copy)
@@ -209,7 +209,7 @@
       drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
 
       $query = 'slave_session='. session_id() .'&singlesignon_dest='. _singlesignon_get_dest();
-      _singlesignon_goto($master_url . url($url, array('query' => $query)));
+      _singlesignon_goto(url($master_url .'/'. $url, array('query' => $query)));
 }
 
 /**