diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
index ddee81e8f76669368018b55e04da59108e9e268a..e5d66821c5c5f98c0f8e2af8cde0dc43b9302c98 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
@@ -4174,6 +4174,7 @@ public class ConversationFragment extends XmppFragment
                         userByRealJid != null
                                 ? userByRealJid
                                 : conversation.getMucOptions().findUserByFullJid(cp);
+                if (user == null) return;
                 popupMenu.inflate(R.menu.muc_details_context);
                 final Menu menu = popupMenu.getMenu();
                 MucDetailsContextMenuHelper.configureMucDetailsContextMenu(