diff --git a/lib/features/copy-paste/ModdleCopy.js b/lib/features/copy-paste/ModdleCopy.js
index e984f8d28c..257a5fdc01 100644
--- a/lib/features/copy-paste/ModdleCopy.js
+++ b/lib/features/copy-paste/ModdleCopy.js
@@ -276,6 +276,10 @@ ModdleCopy.prototype._copyId = function(id, element, clone = false) {
 // helpers //////////
 
 export function getPropertyNames(descriptor, keepDefaultProperties) {
+  if (!descriptor?.properties) {
+    return [];
+  }
+
   return reduce(descriptor.properties, (properties, property) => {
 
     if (keepDefaultProperties && property.default) {