1 files changed, 3 insertions, 3 deletions
diff --git a/src/core/common/CoreCommonUtil.h b/src/core/common/CoreCommonUtil.h
index 6cbf6405..58bb4d40 100644
--- a/src/core/common/CoreCommonUtil.h
+++ b/src/core/common/CoreCommonUtil.h
@@ -52,7 +52,7 @@ class GPGFRONTEND_CORE_EXPORT CoreCommonUtil : public QObject {
    * @brief set a temp cache under a certain key
    *
    */
-  void SetTempCacheValue(const std::string, const std::string);
+  void SetTempCacheValue(const std::string &, const std::string &);
 
   /**
    * @brief after get the temp cache, its value will be imediately ease in
@@ -60,14 +60,14 @@ class GPGFRONTEND_CORE_EXPORT CoreCommonUtil : public QObject {
    *
    * @return std::string
    */
-  std::string GetTempCacheValue(const std::string);
+  std::string GetTempCacheValue(const std::string &);
 
   /**
    * @brief imediately ease temp cache in storage
    *
    * @return std::string
    */
-  void ResetTempCacheValue(const std::string);
+  void ResetTempCacheValue(const std::string &);
 
  signals: