--- Net2/sys/dkbad.h	2018/04/24 18:03:58	1.1.1.1
+++ Net2/sys/dkbad.h	2018/04/24 18:16:07	1.1.1.2
@@ -30,9 +30,13 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)dkbad.h	7.2 (Berkeley) 2/15/91
+ *	from: @(#)dkbad.h	7.2 (Berkeley) 2/15/91
+ *	dkbad.h,v 1.3 1993/05/20 16:22:03 cgd Exp
  */
 
+#ifndef _SYS_DKBAD_H_
+#define _SYS_DKBAD_H_
+
 /*
  * Definitions needed to perform bad sector revectoring ala DEC STD 144.
  *
@@ -66,3 +70,5 @@ struct dkbad {
 #define	SSE	1
 #define	BSE	2
 #define	CONT	3
+
+#endif /* !_SYS_DKBAD_H_ */