diff --git a/deploy/python/preprocess.py b/deploy/python/preprocess.py
index aaa0bef3559bbd76d90d6a95389dcc4178d69b2e..5d7fc929675267100f324d014c1e3a4c630b975f 100644
--- a/deploy/python/preprocess.py
+++ b/deploy/python/preprocess.py
@@ -78,6 +78,9 @@ class UnifiedResize(object):
         if backend.lower() == "cv2":
             if isinstance(interpolation, str):
                 interpolation = _cv2_interp_from_str[interpolation.lower()]
+            # compatible with opencv < version 4.4.0
+            elif not interpolation:
+                interpolation = cv2.INTER_LINEAR
             self.resize_func = partial(cv2.resize, interpolation=interpolation)
         elif backend.lower() == "pil":
             if isinstance(interpolation, str):
diff --git a/ppcls/data/preprocess/ops/operators.py b/ppcls/data/preprocess/ops/operators.py
index 4418f529356d6dbf1b1c3b33761371b4dbcde3b4..e46823d2a751789d50c98e056fa34b496dee156e 100644
--- a/ppcls/data/preprocess/ops/operators.py
+++ b/ppcls/data/preprocess/ops/operators.py
@@ -59,6 +59,9 @@ class UnifiedResize(object):
         if backend.lower() == "cv2":
             if isinstance(interpolation, str):
                 interpolation = _cv2_interp_from_str[interpolation.lower()]
+            # compatible with opencv < version 4.4.0
+            elif not interpolation:
+                interpolation = cv2.INTER_LINEAR
             self.resize_func = partial(cv2.resize, interpolation=interpolation)
         elif backend.lower() == "pil":
             if isinstance(interpolation, str):