diff --git a/python/examples/yolov4/test_client.py b/python/examples/yolov4/test_client.py
index 3db9b3ec3f56ed81f1084b8b22fdab101fa15f98..dfcd58610c3b8df1a1579350c6bb756119cf6940 100644
--- a/python/examples/yolov4/test_client.py
+++ b/python/examples/yolov4/test_client.py
@@ -29,7 +29,7 @@ client = Client()
 client.load_client_config("yolov4_client/serving_client_conf.prototxt")
 client.connect(['127.0.0.1:9393'])
 
-im, im_info = preprocess(sys.argv[1])
+im = preprocess(sys.argv[1])
 fetch_map = client.predict(
     feed={
         "image": im,