diff --git a/usr.bin/vmstat/vmstat.c b/usr.bin/vmstat/vmstat.c
index 2d7eff44e077..3b5c5e36be4e 100644
--- a/usr.bin/vmstat/vmstat.c
+++ b/usr.bin/vmstat/vmstat.c
@@ -1217,7 +1217,7 @@ static void
 usage(void)
 {
 	(void)fprintf(stderr, "%s%s",
-		"usage: vmstat [-afimsz] [-c count] [-M core [-N system]] [-w wait]\n",
+		"usage: vmstat [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n",
 		"              [-n devs] [-p type,if,pass] [disks]\n");
 	exit(1);
 }