diff --git a/acpbot.py b/acpbot.py
index 58c544d..3bc6b6a 100644
--- a/acpbot.py
+++ b/acpbot.py
@@ -141,7 +141,7 @@ async def main():
                 except MessageIdInvalidError:
                     chat_data['lastpinned'] = 0
                     to_write = True
-                except ChatNotModifiedError:
+                except (ChatNotModifiedError, AttributeError):
                     pass
                 processing_chats[e.chat_id][2] = False
             if to_delete: