1.diff

diff --git a/usr.bin/systat/vmstat.c b/usr.bin/systat/vmstat.c
index 147d743..e6eb301 100644
--- a/usr.bin/systat/vmstat.c
+++ b/usr.bin/systat/vmstat.c
@@ -144,8 +144,6 @@ static struct nlist namelist[] = {
 	{ .n_name = "_inactivevnodes" },
 #define	X_ACTIVEVNODES	5
 	{ .n_name = "_activevnodes" },
-#define X_NUMDIRTYBUFFERS 6
-	{ .n_name = "_dirtybufspace" },
 	{ .n_name = "" },
 };
 
@@ -828,12 +826,17 @@ getinfo(struct Info *ls)
 	NREAD(X_INACTIVEVNODES, &ls->inactivevnodes,
 						sizeof(ls->inactivevnodes));
 	NREAD(X_ACTIVEVNODES, &ls->activevnodes, sizeof(ls->activevnodes));
-	NREAD(X_NUMDIRTYBUFFERS, &ls->dirtybufspace, sizeof(ls->dirtybufspace));
 
 	if (nintr) {
 		size = nintr * sizeof(ls->intrcnt[0]);
 		sysctlbyname("hw.intrcnt_all", ls->intrcnt, &size, NULL, 0);
 	}
+	size = sizeof(ls->dirtybufspace);
+	if (sysctlbyname("vfs.dirtybufspace", &ls->dirtybufspace, &size,
+		NULL, 0) < 0) {
+		error("Can't get kernel info: %s\n", strerror(errno));
+		bzero(&ls->dirtybufspace, sizeof(ls->dirtybufspace));
+	}
 	size = sizeof(ls->Total);
 	if (sysctlbyname("vm.vmtotal", &ls->Total, &size, NULL, 0) < 0) {
 		error("Can't get kernel info: %s\n", strerror(errno));