diff --git a/library/aes.c b/library/aes.c
index 0295f3f..6456c54 100644
--- a/library/aes.c
+++ b/library/aes.c
@@ -1,7 +1,7 @@
 /*
  *  FIPS-197 compliant AES implementation
  *
- *  Copyright (C) 2006-2010, Brainspark B.V.
+ *  Copyright (C) 2006-2013, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)
  *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@@ -38,6 +38,8 @@
 #include "polarssl/padlock.h"
 #endif
 
+#if !defined(POLARSSL_AES_ALT)
+
 /*
  * 32-bit integer manipulation macros (little endian)
  */
@@ -914,6 +916,7 @@
     return( 0 );
 }
 #endif /* POLARSSL_CIPHER_MODE_CTR */
+#endif /* !POLARSSL_AES_ALT */
 
 #if defined(POLARSSL_SELF_TEST)