diff --git a/twrpDigest.hpp b/twrpDigest.hpp
index 5edd4d3..2c08ec5 100644
--- a/twrpDigest.hpp
+++ b/twrpDigest.hpp
@@ -1,5 +1,5 @@
 /*
-        Copyright 2012 bigbiff/Dees_Troy TeamWin
+        Copyright 2012 to 2016 bigbiff/Dees_Troy TeamWin
         This file is part of TWRP/TeamWin Recovery Project.
 
         TWRP is free software: you can redistribute it and/or modify
@@ -25,7 +25,7 @@
 class twrpDigest
 {
 public:
-	void setfn(string fn);
+	void setfn(const string& fn);
 	int computeMD5(void);
 	int verify_md5digest(void);
 	int write_md5digest(void);