diff --git a/lib/features/popup-menu/PopupMenu.js b/lib/features/popup-menu/PopupMenu.js
index <HASH>..<HASH> 100644
--- a/lib/features/popup-menu/PopupMenu.js
+++ b/lib/features/popup-menu/PopupMenu.js
@@ -308,7 +308,7 @@ PopupMenu.prototype._createEntries = function(entries, container) {
     self._createEntry(entry, entriesContainer);
   });
 
-  domClasses(entriesContainer).add('dropdown-menu');
+  domClasses(entriesContainer).add('popup-dropdown-menu');
 
   container.appendChild(entriesContainer);
 };
@@ -364,7 +364,7 @@ PopupMenu.prototype._createEntry = function(entry, container) {
     if(entry.content.entries) {
       // create a nested menu
       label.textContent = entry.content.label;
-      entryClasses.add('dropdown');
+      entryClasses.add('popup-dropdown');
       this._createEntries(entry.content.entries, entryContainer);
     } else {
       // create a normal entry
refact(popup): prefix dropdown class names with popup-

Related to CAM-<I>