diff --git a/telethon/events/__init__.py b/telethon/events/__init__.py
index 204609c0..1f3b15f2 100644
--- a/telethon/events/__init__.py
+++ b/telethon/events/__init__.py
@@ -277,7 +277,14 @@ class NewMessage(_EventBuilder):
                 Whether the message is a reply to some other or not.
         """
         def __init__(self, message):
-            super().__init__(chat_peer=message.to_id,
+            if not message.out and isinstance(message.to_id, types.PeerUser):
+                # Incoming message (e.g. from a bot) has to_id=us, and
+                # from_id=bot (the actual "chat" from an user's perspective).
+                chat_peer = types.PeerUser(message.from_id)
+            else:
+                chat_peer = message.to_id
+
+            super().__init__(chat_peer=chat_peer,
                              msg_id=message.id, broadcast=bool(message.post))
 
             self.message = message