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-rw-r--r--sys/net/if_slvar.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/net/if_slvar.h b/sys/net/if_slvar.h
index 0121927411db..94e4773b8b08 100644
--- a/sys/net/if_slvar.h
+++ b/sys/net/if_slvar.h
@@ -31,9 +31,12 @@
* SUCH DAMAGE.
*
* from: @(#)if_slvar.h 7.7 (Berkeley) 5/7/91
- * $Id: if_slvar.h,v 1.2 1993/10/16 17:43:22 rgrimes Exp $
+ * $Id: if_slvar.h,v 1.3 1993/11/07 17:47:00 wollman Exp $
*/
+#ifndef _NET_IF_SLVAR_H_
+#define _NET_IF_SLVAR_H_ 1
+
/*
* Definitions for SLIP interface data structures
*
@@ -72,3 +75,4 @@ struct sl_softc {
#define SLIOCGFLAGS _IOR('t', 90, int) /* get configuration flags */
#define SLIOCSFLAGS _IOW('t', 89, int) /* set configuration flags */
#define SLIOCGUNIT _IOR('t', 88, int) /* get slip unit number */
+#endif /* _NET_IF_SLVAR_H_ */