diff --git a/bot/bot.py b/bot/bot.py
index 033639774..3e0285bc8 100644
--- a/bot/bot.py
+++ b/bot/bot.py
@@ -329,6 +329,10 @@ async def fake_gen():
         return
 
 async def unsupport_message_handle(update: Update, context: CallbackContext, message=None):
+    # check if bot was mentioned (for group chats)
+    if not await is_bot_mentioned(update, context):
+        return
+    
     error_text = f"I don't know how to read files or videos. Send the picture in normal mode (Quick Mode)."
     logger.error(error_text)
     await update.message.reply_text(error_text)
@@ -869,4 +873,4 @@ def run_bot() -> None:
 
 
 if __name__ == "__main__":
-    run_bot()
\ No newline at end of file
+    run_bot()