Index: usr.bin/vmstat/vmstat.c
===================================================================
--- usr.bin/vmstat/vmstat.c
+++ usr.bin/vmstat/vmstat.c
@@ -289,7 +289,7 @@
 				goto retry_nlist;
 			}
 			for (c = 0;
-			     c < (int)(sizeof(namelist)/sizeof(namelist[0]));
+			     c < (int)(nitems(namelist));
 			     c++)
 				if (namelist[c].n_type == 0)
 					bufsize += strlen(namelist[c].n_name) + 1;
@@ -297,7 +297,7 @@
 			buf = bp = alloca(bufsize);
 
 			for (c = 0;
-			     c < (int)(sizeof(namelist)/sizeof(namelist[0]));
+			     c < (int)(nitems(namelist));
 			     c++)
 				if (namelist[c].n_type == 0) {
 					xo_error(" %s",