--- hmac_md5.c~	2005-07-28 19:29:07.000000000 +0200
+++ hmac_md5.c	2006-06-04 15:49:09.000000000 +0200
@@ -4,10 +4,11 @@
  *
  * Code taken from RFC2104.
  */
-
+#include <stdlib.h>
 #include <openssl/md5.h>
 #include <string.h>
 
+
 #include "hmac_md5.h"
 
 /**