diff --git a/sys/miscfs/nullfs/null_vnops.c b/sys/miscfs/nullfs/null_vnops.c
index 65a4c6303748..af7055249691 100644
--- a/sys/miscfs/nullfs/null_vnops.c
+++ b/sys/miscfs/nullfs/null_vnops.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: null_vnops.c,v 1.9 1996/10/13 02:21:35 christos Exp $	*/
+/*	$NetBSD: null_vnops.c,v 1.10 1997/05/17 20:32:53 pk Exp $	*/
 
 /*
  * Copyright (c) 1992, 1993
@@ -362,7 +362,7 @@ null_getattr(v)
 		struct proc *a_p;
 	} */ *ap = v;
 	int error;
-	if ((error = null_bypass(ap)) != NULL)
+	if ((error = null_bypass(ap)) != 0)
 		return (error);
 	/* Requires that arguments be restored. */
 	ap->a_vap->va_fsid = ap->a_vp->v_mount->mnt_stat.f_fsid.val[0];
diff --git a/sys/msdosfs/msdosfs_fat.c b/sys/msdosfs/msdosfs_fat.c
index c99ff915d255..05c6c5b3977a 100644
--- a/sys/msdosfs/msdosfs_fat.c
+++ b/sys/msdosfs/msdosfs_fat.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: msdosfs_fat.c,v 1.24 1996/10/13 04:16:32 christos Exp $	*/
+/*	$NetBSD: msdosfs_fat.c,v 1.25 1997/05/17 20:33:57 pk Exp $	*/
 
 /*-
  * Copyright (C) 1994, 1995 Wolfgang Solfrank.
@@ -628,7 +628,7 @@ chainlength(pmp, start, count)
 	while (++idx <= max_idx) {
 		if (len >= count)
 			break;
-		if ((map = pmp->pm_inusemap[idx]) != NULL) {
+		if ((map = pmp->pm_inusemap[idx]) != 0) {
 			len +=  ffs(map) - 1;
 			break;
 		}
diff --git a/usr.sbin/syslogd/syslogd.c b/usr.sbin/syslogd/syslogd.c
index 234f680bdf7d..f16ecbc7cd53 100644
--- a/usr.sbin/syslogd/syslogd.c
+++ b/usr.sbin/syslogd/syslogd.c
@@ -39,7 +39,7 @@ static char copyright[] =
 
 #ifndef lint
 /*static char sccsid[] = "@(#)syslogd.c	8.3 (Berkeley) 4/4/94";*/
-static char rcsid[] = "$NetBSD: syslogd.c,v 1.9 1997/04/26 05:12:32 mrg Exp $";
+static char rcsid[] = "$NetBSD: syslogd.c,v 1.10 1997/05/17 20:31:15 pk Exp $";
 #endif /* not lint */
 
 /*
@@ -369,7 +369,7 @@ main(argc, argv)
 				printline(cvthname(&frominet), line);
 			} else if (i < 0 && errno != EINTR)
 				logerror("recvfrom inet");
-		} 
+		}
 	}
 }
 
@@ -930,7 +930,7 @@ init(signo)
 		 */
 		for (p = cline; isspace(*p); ++p)
 			continue;
-		if (*p == NULL || *p == '#')
+		if (*p == '\0' || *p == '#')
 			continue;
 		for (p = strchr(cline, '\0'); isspace(*--p);)
 			continue;