diff --git a/frigate/video.py b/frigate/video.py
index a9e0e0e47..dc116db76 100755
--- a/frigate/video.py
+++ b/frigate/video.py
@@ -190,6 +190,8 @@ def track_camera(name, config, global_objects_config, frame_queue, frame_shape,
     # load in the mask for object detection
     if 'mask' in config:
         mask = cv2.imread("/config/{}".format(config['mask']), cv2.IMREAD_GRAYSCALE)
+        if img.size == 0:
+            print(f"Failed to read mask file")
     else:
         mask = None
 
@@ -370,4 +372,4 @@ def track_camera(name, config, global_objects_config, frame_queue, frame_shape,
         # add to the queue
         detected_objects_queue.put((name, frame_time, object_tracker.tracked_objects))
 
-    print(f"{name}: exiting subprocess")
\ No newline at end of file
+    print(f"{name}: exiting subprocess")