diff --git a/sbin/fsck_ffs/setup.c b/sbin/fsck_ffs/setup.c
index bd928fb8698..d8d77a55e93 100644
--- a/sbin/fsck_ffs/setup.c
+++ b/sbin/fsck_ffs/setup.c
@@ -433,6 +433,9 @@ readsb(listerr)
 	memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp);
 	altsblock.fs_csp = sblock.fs_csp;
 	altsblock.fs_maxcluster = sblock.fs_maxcluster;
+	altsblock.fs_contigdirs = sblock.fs_contigdirs;
+	altsblock.fs_avgfilesize = sblock.fs_avgfilesize;
+	altsblock.fs_avgfpdir = sblock.fs_avgfpdir;
 	memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt);
 	memmove(altsblock.fs_snapinum, sblock.fs_snapinum,
 		sizeof sblock.fs_snapinum);