diff --git a/matrix_appservice_kakaotalk/portal.py b/matrix_appservice_kakaotalk/portal.py
index dbfd14a..367cec8 100644
--- a/matrix_appservice_kakaotalk/portal.py
+++ b/matrix_appservice_kakaotalk/portal.py
@@ -773,8 +773,8 @@ class Portal(DBPortal, BasePortal):
         sender, is_relay = await self.get_relay_sender(orig_sender, f"message {event_id}")
         if not sender:
             raise Exception("not logged in")
-        elif not sender.has_state:
-            raise Exception("not connected to KakaoTalk")
+        elif not sender.is_connected:
+            raise Exception("not connected to KakaoTalk chats")
         elif is_relay:
             await self.apply_relay_message_format(orig_sender, message)
         if message.msgtype == MessageType.TEXT or message.msgtype == MessageType.NOTICE: