diff --git a/app.py b/app.py
index beececc..022e7ac 100644
--- a/app.py
+++ b/app.py
@@ -81,7 +81,7 @@ def worker(id,source,region=None,stream=False):
             detections = sv.Detections.from_yolov8(result)
             if result.boxes.id is not None:
                 detections.tracker_id = result.boxes.id.cpu().numpy().astype(int)
-            detections = detections[(detections.tracker_id != None)]
+            detections = detections[(detections.tracker_id is not None)]
             
             count += 1
             names = {}