diff --git a/kraken/KRContext.cpp b/kraken/KRContext.cpp
index de31ec7..fc75f09 100755
--- a/kraken/KRContext.cpp
+++ b/kraken/KRContext.cpp
@@ -155,7 +155,7 @@ void KRContext::SetLogCallback(log_callback *log_callback, void *user_data)
     s_log_callback_user_data = user_data;
 }
 
-void KRContext::Log(log_level level, const std::string &message_format, ...)
+void KRContext::Log(log_level level, const std::string message_format, ...)
 {
     va_list args;
     va_start(args, message_format);