diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/keyboard.js b/packages/node_modules/@node-red/editor-client/src/js/ui/keyboard.js
index ae104637c..40e11aa72 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/keyboard.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/keyboard.js
@@ -268,7 +268,7 @@ RED.keyboard = (function() {
                 }
                 if (Object.keys(handler).length > 0) {
                     // check if there's a potential combined handler initiated by this keyCode 
-                    for (h in handler) {
+                    for (let h in handler) {
                         if (matchHandlerToEvent(evt,handler[h]) > -1) {
                             partialState = handler;
                             evt.preventDefault();