diff --git a/tools/replay/unlogger.py b/tools/replay/unlogger.py
index e7020f29..586b71c4 100755
--- a/tools/replay/unlogger.py
+++ b/tools/replay/unlogger.py
@@ -107,7 +107,8 @@ class UnloggerWorker(object):
         try:
           img = self._frame_reader.get(frame_id, pix_fmt="rgb24")
         except Exception:
-          pass
+          img = None
+
         fr_time = time.time() - s1
         if fr_time > 0.05:
           print("FRAME(%d) LAG -- %.2f ms" % (frame_id, fr_time*1000.0))