diff --git a/include/polarssl/bn_mul.h b/include/polarssl/bn_mul.h
index a73d5fb..87b2052 100644
--- a/include/polarssl/bn_mul.h
+++ b/include/polarssl/bn_mul.h
@@ -1,6 +1,8 @@
 /**
  * \file bn_mul.h
  *
+ * \brief  Multi-precision integer library
+ *
  *  Copyright (C) 2006-2010, Brainspark B.V.
  *
  *  This file is part of PolarSSL (http://www.polarssl.org)