diff --git a/inference_video.py b/inference_video.py
index f445bd9..68793c0 100644
--- a/inference_video.py
+++ b/inference_video.py
@@ -278,7 +278,7 @@ if args.montage:
 else:
     write_buffer.put(lastframe)
 
-write_buffer.put(frame)
+write_buffer.put(None)
 
 import time
 while(not write_buffer.empty()):