1 files changed, 1 insertions, 1 deletions
diff --git a/md5.h b/md5.h
index c396a8dc..77e70e66 100644
--- a/md5.h
+++ b/md5.h
@@ -25,7 +25,7 @@ void MD5Update(struct MD5Context *context, unsigned char const *buf,
 void MD5Final(unsigned char digest[16], struct MD5Context *context);
 void MD5Transform(uint32 buf[4], uint32 const in[16]);
 
-char *MD5Digest (unsigned char *s);
+char *MD5Digest (unsigned const char *s);
 
 /*
  * This is needed to make RSAREF happy on some MS-DOS compilers.