diff --git a/lib/md5.h b/lib/md5.h
index acb8d488..fa4b4adb 100644
--- a/lib/md5.h
+++ b/lib/md5.h
@@ -37,8 +37,8 @@
 
 #include "common.h"
 
+#define MD5_BLOCK_LEN       64
 #define MD5_DIGEST_LEN      16
-#define MD5_BLOCK_LEN       MD5_DIGEST_LEN
 #define MD5_DIGEST_STR_LEN  (MD5_DIGEST_LEN * 2 + 1)
 #define MD5_B64_LEN         22