1 files changed, 2 insertions, 2 deletions
diff --git a/Source/cmCryptoHash.h b/Source/cmCryptoHash.h
index 1bea9ab..88cd240 100644
--- a/Source/cmCryptoHash.h
+++ b/Source/cmCryptoHash.h
@@ -21,8 +21,8 @@ class cmCryptoHash
 public:
   virtual ~cmCryptoHash() {}
   static cmsys::auto_ptr<cmCryptoHash> New(const char* algo);
-  std::string HashString(const char* input);
-  std::string HashFile(const char* file);
+  std::string HashString(const std::string& input);
+  std::string HashFile(const std::string& file);
 protected:
   virtual void Initialize()=0;
   virtual void Append(unsigned char const*, int)=0;