diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/view.js b/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
index 7d28a2e65..0905534b6 100755
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
@@ -3921,7 +3921,10 @@ RED.view = (function() {
                             }
                             this.__buttonGroup__.setAttribute("transform", "translate("+x+",2)");
 
-                            this.__buttonGroupBackground__.setAttribute("fill-opacity",d._def.button.toggle?(d[d._def.button.toggle]?1:0.2):1)
+                            if (d._def.button.toggle) {
+                                this.__buttonGroupButton__.setAttribute("fill-opacity",d[d._def.button.toggle]?1:0.2)
+                                this.__buttonGroupBackground__.setAttribute("fill-opacity",d[d._def.button.toggle]?1:0.2)
+                            }
 
                             if (typeof d._def.button.visible === "function") { // is defined and a function...
                                 if (d._def.button.visible.call(d) === false) {