diff --git a/usr.bin/systat/vmstat.c b/usr.bin/systat/vmstat.c
index 7779de326b2b..5da93c383e0d 100644
--- a/usr.bin/systat/vmstat.c
+++ b/usr.bin/systat/vmstat.c
@@ -119,7 +119,7 @@ static struct Info {
 	int	desiredvnodes;
 	long	numvnodes;
 	long	freevnodes;
-	long	numdirtybuffers;
+	int	numdirtybuffers;
 } s, s1, s2, z;
 
 struct statinfo cur, last, run;