diff --git a/user_channel/user_layer.hpp b/user_channel/user_layer.hpp
index 26f980a..b0d0d4c 100644
--- a/user_channel/user_layer.hpp
+++ b/user_channel/user_layer.hpp
@@ -141,7 +141,7 @@
  *
  *  @return ccSuccess for success, others for failure.
  */
-Cc ipmiUserSetUserName(const uint8_t userId, const std::string& userName);
+Cc ipmiUserSetUserName(const uint8_t userId, const char* userName);
 
 /** @brief set user password
  *