diff --git a/src/md5.h b/src/md5.h
--- a/src/md5.h
+++ b/src/md5.h
@@ -72,11 +72,6 @@ typedef struct md5_state_s {
     md5_byte_t buf[64];  /* accumulate block */
 } md5_state_t;
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 /* Initialize the algorithm. */
 void md5_init(md5_state_t *pms);
 
@@ -86,8 +81,4 @@ void md5_append(md5_state_t *pms, const 
 /* Finish the message and return the digest. */
 void md5_finish(md5_state_t *pms, md5_byte_t digest[16]);
 
-#ifdef __cplusplus
-}  /* end extern "C" */
-#endif
-
 #endif /* MD5_INCLUDED */