diff --git a/include/simpleplugin/class_simpleManagement.inc b/include/simpleplugin/class_simpleManagement.inc
index 64f49534176afbfb92b6d05e50b6508ad3ae6035..49addac8fb78183cf89803b71300d99fd98ff7ea 100644
--- a/include/simpleplugin/class_simpleManagement.inc
+++ b/include/simpleplugin/class_simpleManagement.inc
@@ -118,6 +118,7 @@ class templateDialog
 
   function handle_cancel ()
   {
+    $this->simpleManagement->remove_lock();
     $this->simpleManagement->closeDialogs();
     return FALSE;
   }