diff --git a/deploy/cpp/src/paddlex.cpp b/deploy/cpp/src/paddlex.cpp
index b3e292c23e781d675ad7e23512fe96672d4b8121..90a4a4452b9e5f3eba1c0b4c7ab88f5b91e03971 100644
--- a/deploy/cpp/src/paddlex.cpp
+++ b/deploy/cpp/src/paddlex.cpp
@@ -98,7 +98,7 @@ bool Model::load_config(const std::string& model_dir) {
 
 bool Model::preprocess(const cv::Mat& input_im, ImageBlob* blob) {
   cv::Mat im = input_im.clone();
-  if (!transforms_.Run(&im, &inputs_)) {
+  if (!transforms_.Run(&im, blob)) {
     return false;
   }
   return true;