diff --git a/usr.sbin/makefs/ffs/mkfs.c b/usr.sbin/makefs/ffs/mkfs.c
--- a/usr.sbin/makefs/ffs/mkfs.c
+++ b/usr.sbin/makefs/ffs/mkfs.c
@@ -529,8 +529,9 @@
 		initcg(cylno, tstamp, fsopts);
 		if (cylno % nprintcols == 0)
 			printf("\n");
-		printf(" %*lld,", printcolwidth,
-			(long long)fsbtodb(&sblock, cgsblock(&sblock, cylno)));
+		printf(" %*lld%s", printcolwidth,
+		    (long long)fsbtodb(&sblock, cgsblock(&sblock, cylno)),
+		    cylno == sblock.fs_ncg - 1 ? "" : ",");
 		fflush(stdout);
 	}
 	printf("\n");