diff --git a/include/simpleplugin/class_simpleManagement.inc b/include/simpleplugin/class_simpleManagement.inc
index 52603afa2c4905ee248763f47a7d8da11d44d04e..7a8bb39f582a3e6277c2e197f5c4c27b705830cf 100644
--- a/include/simpleplugin/class_simpleManagement.inc
+++ b/include/simpleplugin/class_simpleManagement.inc
@@ -110,6 +110,7 @@ class templateDialog
 
   function handle_cancel ()
   {
+    $this->simpleManagement->remove_lock();
     $this->simpleManagement->closeDialogs();
     return FALSE;
   }