diff --git a/extensions/obviousAlexC/penPlus.js b/extensions/obviousAlexC/penPlus.js
index 824252c15d..4af6d53682 100644
--- a/extensions/obviousAlexC/penPlus.js
+++ b/extensions/obviousAlexC/penPlus.js
@@ -4824,7 +4824,7 @@
     //Modal themes
     _setupTheme() {
       //Use a predefined pen+ theme if packaged
-      if (Scratch.vm.runtime.isPackaged) {
+      if (typeof scaffolding !== "undefined") {
         this._menuBarBackground = "#0FBD8C";
         this._defaultBackgroundColor = "white";
         this._textColor = "black";