diff --git a/packages/node_modules/@node-red/editor-client/src/ace/mode/nrjavascript_worker.js b/packages/node_modules/@node-red/editor-client/src/ace/mode/nrjavascript_worker.js
index 310831607..10f0cf812 100644
--- a/packages/node_modules/@node-red/editor-client/src/ace/mode/nrjavascript_worker.js
+++ b/packages/node_modules/@node-red/editor-client/src/ace/mode/nrjavascript_worker.js
@@ -76,7 +76,7 @@ oop.inherits(NRJavaScriptWorker, Mirror);
 
 (function() {
     this.setOptions = function(options) {
-        o.options = {
+        this.options = {
             // undef: true,
             // unused: true,
             esversion: 9,
@@ -98,7 +98,7 @@ oop.inherits(NRJavaScriptWorker, Mirror);
         if (options) {
             for (var opt in options) {
                 if (options.hasOwnProperty(opt)) {
-                    o.options[opt] = options[opt];
+                    this.options[opt] = options[opt];
                 }
             }
         }