diff --git a/packages/moxxmpp/lib/src/xeps/xep_0045/xep_0045.dart b/packages/moxxmpp/lib/src/xeps/xep_0045/xep_0045.dart
index 59e7d6a..958510c 100644
--- a/packages/moxxmpp/lib/src/xeps/xep_0045/xep_0045.dart
+++ b/packages/moxxmpp/lib/src/xeps/xep_0045/xep_0045.dart
@@ -282,6 +282,9 @@ class MUCManager extends XmppManagerBase {
         }
 
         // Check if this is the message reflection.
+        if (message.id == null) {
+          return state;
+        }
         final pending =
             (message.id!, state.extensions.get<StableIdData>()?.originId);
         if (fromJid.resource == roomState.nick &&