diff --git a/deploy/cpp_infer/include/config.h b/deploy/cpp_infer/include/config.h
index 2adefb73675b3607b3dd993f48517e51e9a3d941..c5257d8ade72bfc7a68c5ca5c2c78fd5b6c1983c 100644
--- a/deploy/cpp_infer/include/config.h
+++ b/deploy/cpp_infer/include/config.h
@@ -47,7 +47,7 @@ public:
 
     this->det_db_box_thresh = stod(config_map_["det_db_box_thresh"]);
 
-    this->det_db_box_thresh = stod(config_map_["det_db_box_thresh"]);
+    this->det_db_unclip_ratio = stod(config_map_["det_db_unclip_ratio"]);
 
     this->det_model_dir.assign(config_map_["det_model_dir"]);