diff --git a/src/Parsee/User.c b/src/Parsee/User.c
index 6d6d0be..e68082b 100644
--- a/src/Parsee/User.c
+++ b/src/Parsee/User.c
@@ -560,7 +560,7 @@ ParseeSendPresence(ParseeData *data)
         char *chat_id = ParseeGetFromMUCID(data, muc);
         DbRef *chat = DbLockIntent(data->db, DB_HINT_READONLY, 2, "chats", chat_id);
         uint64_t ts = GrabInteger(DbJson(chat), 1, "ts");
-        int diff = ts ? (UtilTsMillis() - ts) / 1000 : -1;
+        int diff = ts ? (int) ((UtilTsMillis() - ts) / 1000) : -1;
         /* Make a fake user join the MUC */
         Log(LOG_NOTICE, "Sending presence to %s last=%ds", rev, diff);
         XMPPJoinMUC(data->jabber, "parsee", rev, NULL, diff, false);