diff --git a/deploy/python/mot_jde_infer.py b/deploy/python/mot_jde_infer.py
index d35a396298b52f3e6b9b3b49b7548c2280c791b3..584fcb384e65d2aa1a59025f2f3f522fe75262e8 100644
--- a/deploy/python/mot_jde_infer.py
+++ b/deploy/python/mot_jde_infer.py
@@ -91,6 +91,8 @@ class JDE_Detector(Detector):
 
     def postprocess(self, pred_dets, pred_embs, threshold):
         online_targets = self.tracker.update(pred_dets, pred_embs)
+        if online_targets == []:
+            return [pred_dets[0][:4]], [pred_dets[0][4]], [1]
         online_tlwhs, online_ids = [], []
         online_scores = []
         for t in online_targets: