diff --git a/src/xmpp/message.c b/src/xmpp/message.c
index 41ab6a81..dee41baa 100644
--- a/src/xmpp/message.c
+++ b/src/xmpp/message.c
@@ -872,7 +872,7 @@ _handle_groupchat(xmpp_stanza_t *const stanza)
         message->timestamp = stanza_get_delay_from(stanza, jid->domainpart);
     }
 
-    bool is_muc_history;
+    bool is_muc_history = FALSE;
     if (message->timestamp != NULL) {
         is_muc_history = TRUE;
         g_date_time_unref(message->timestamp);