diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editors/monaco.js b/packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editors/monaco.js
index 2decabc52..92311cd09 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editors/monaco.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/editors/code-editors/monaco.js
@@ -990,6 +990,10 @@ RED.editor.codeEditor.monaco = (function() {
             _executeEdits(this,[op]);
         }
 
+        ed.setReadOnly = function setReadOnly(readOnly) {
+            ed.updateOptions({ readOnly: readOnly })
+        }
+
         ed.session.replace = function replace(range, text) {
             var op = { range: range, text: text, forceMoveMarkers: true };
             _executeEdits(this,[op]);