diff --git a/library/md4.c b/library/md4.c
index 67fcd99..672520e 100644
--- a/library/md4.c
+++ b/library/md4.c
@@ -24,11 +24,11 @@
  *  http://www.ietf.org/rfc/rfc1320.txt
  */
 
-#include "xyssl/config.h"
+#include "polarssl/config.h"
 
-#if defined(XYSSL_MD4_C)
+#if defined(POLARSSL_MD4_C)
 
-#include "xyssl/md4.h"
+#include "polarssl/md4.h"
 
 #include <string.h>
 #include <stdio.h>
@@ -368,7 +368,7 @@
     memset( &ctx, 0, sizeof( md4_context ) );
 }
 
-#if defined(XYSSL_SELF_TEST)
+#if defined(POLARSSL_SELF_TEST)
 
 /*
  * RFC 1320 test vectors