diff --git a/lib/asn1/libasn1.h b/lib/asn1/libasn1.h
index 034e9c9bb..cda36b18f 100644
--- a/lib/asn1/libasn1.h
+++ b/lib/asn1/libasn1.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997 Kungliga Tekniska Högskolan
+ * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
  * (Royal Institute of Technology, Stockholm, Sweden). 
  * All rights reserved. 
  *
@@ -41,6 +41,7 @@
 #endif
 
 #include <stdlib.h>
+#include <string.h>
 #include <errno.h>
 #include "asn1.h"
 #include "der.h"