diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/common/treeList.js b/packages/node_modules/@node-red/editor-client/src/js/ui/common/treeList.js
index 5c9bdb5fe..df9592508 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/common/treeList.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/common/treeList.js
@@ -356,7 +356,7 @@
                             delete that._items[key];
                         }
                     }
-                    that._data = that._data.filter(data => data.id !== item.id)
+                    that._data = that._data.filter(function(data) { return data.id !== item.id})
                 }
             }
             item.treeList.insertChildAt = function(newItem,position,select) {