diff --git a/js/Plugin/jstree/hm.jstree.js b/js/Plugin/jstree/hm.jstree.js
index 9cf24cf3af460226dc0eeda9d0df688935cb969a..3d72bdcda258bde381df4d4b625abac1ab1675dd 100644
--- a/js/Plugin/jstree/hm.jstree.js
+++ b/js/Plugin/jstree/hm.jstree.js
@@ -48,6 +48,7 @@
                   }
                 },
                 themes: themes,
+                "check_callback" : true,
                 "multiple": false,
               },
               search: {