1 files changed, 1 insertions, 1 deletions

diff --git a/src/common/param_package.h b/src/common/param_package.h
index c4c11b221..7842cd4ef 100644
--- a/src/common/param_package.h
+++ b/src/common/param_package.h
@@ -28,7 +28,7 @@ public:
     std::string Get(const std::string& key, const std::string& default_value) const;
     int Get(const std::string& key, int default_value) const;
     float Get(const std::string& key, float default_value) const;
-    void Set(const std::string& key, const std::string& value);
+    void Set(const std::string& key, std::string value);
     void Set(const std::string& key, int value);
     void Set(const std::string& key, float value);
     bool Has(const std::string& key) const;