diff --git a/yolox/tracker/byte_tracker.py b/yolox/tracker/byte_tracker.py
index 2d004599..08db37f0 100644
--- a/yolox/tracker/byte_tracker.py
+++ b/yolox/tracker/byte_tracker.py
@@ -13,7 +13,7 @@
 class STrack(BaseTrack):
     shared_kalman = KalmanFilter()
     def __init__(self, tlwh, score):
-
+        super(STrack, self).__init__()
         # wait activate
         self._tlwh = np.asarray(tlwh, dtype=np.float)
         self.kalman_filter = None