diff --git a/misc/mke2fs.conf.in b/misc/mke2fs.conf.in
index 78fe50a..291a723 100644
--- a/misc/mke2fs.conf.in
+++ b/misc/mke2fs.conf.in
@@ -11,7 +11,7 @@
 		features = has_journal
 	}
 	ext4 = {
-		features = has_journal,extent,huge_file,flex_bg,64bit,dir_nlink,extra_isize
+		features = has_journal,extent,huge_file,uninit_bg,flex_bg,64bit,dir_nlink,extra_isize
 		inode_size = 256
 	}
 	ext4dev = {