diff --git a/python/fastdeploy/vision/keypointdetection/pptinypose/__init__.py b/python/fastdeploy/vision/keypointdetection/pptinypose/__init__.py
index 679605a7c..ab4ee0cef 100644
--- a/python/fastdeploy/vision/keypointdetection/pptinypose/__init__.py
+++ b/python/fastdeploy/vision/keypointdetection/pptinypose/__init__.py
@@ -76,10 +76,10 @@ class PPTinyPose(FastDeployModel):
         """
         This function will disable normalize in preprocessing step.
         """
-        self.disable_normalize()
+        self._model.disable_normalize()
 
     def disable_permute(self):
         """
         This function will disable hwc2chw in preprocessing step.
         """
-        self.disable_permute()
+        self._model.disable_permute()