--- Net2/nfs/nfsm_subs.h	2018/04/24 18:03:57	1.1
+++ Net2/nfs/nfsm_subs.h	2018/04/24 18:09:44	1.1.1.2
@@ -36,6 +36,9 @@
  *	@(#)nfsm_subs.h	7.11 (Berkeley) 4/16/91
  */
 
+#ifndef _NFS_NFSM_SUBS_H_
+#define _NFS_NFSM_SUBS_H_
+
 /*
  * These macros do strange and peculiar things to mbuf chains for
  * the assistance of the nfs code. To attempt to use them for any
@@ -299,3 +302,4 @@ extern struct mbuf *nfsm_reqh();
 	fp->fa_ctime.tv_sec = txdr_unsigned(vap->va_ctime.tv_sec); \
 	fp->fa_ctime.tv_usec = txdr_unsigned(vap->va_gen)
 
+#endif /* !_NFS_NFSM_SUBS_H_ */