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-rw-r--r--sys/net/if_dl.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/net/if_dl.h b/sys/net/if_dl.h
index d08f393..f3db94a 100644
--- a/sys/net/if_dl.h
+++ b/sys/net/if_dl.h
@@ -31,9 +31,12 @@
* SUCH DAMAGE.
*
* @(#)if_dl.h 8.1 (Berkeley) 6/10/93
- * $Id$
+ * $Id: if_dl.h,v 1.2 1994/08/02 07:46:12 davidg Exp $
*/
+#ifndef _NET_IF_DL_H_
+#define _NET_IF_DL_H_
+
/*
* A Link-Level Sockaddr may specify the interface in one of two
* ways: either by means of a system-provided index number (computed
@@ -79,3 +82,5 @@ char *link_ntoa __P((const struct sockaddr_dl *));
__END_DECLS
#endif /* !KERNEL */
+
+#endif
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