diff --git a/libdino/src/service/chat_interaction.vala b/libdino/src/service/chat_interaction.vala
index f4aaa02e..566eac7e 100644
--- a/libdino/src/service/chat_interaction.vala
+++ b/libdino/src/service/chat_interaction.vala
@@ -196,7 +196,7 @@ public class ChatInteraction : StreamInteractionModule, Object {
         XmppStream? stream = stream_interactor.get_stream(conversation.account);
         if (stream == null) return;
 
-        if (message.stanza_id != null) return; // Need a stanza id to mark
+        if (message.stanza_id == null) return; // Need a stanza id to mark
 
         switch (marker) {
             case Xep.ChatMarkers.MARKER_RECEIVED: