diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index ae55fdd..dc3f27e 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1546,7 +1546,7 @@
 	.name		= "ext2",
 	.mount		= ext2_mount,
 	.kill_sb	= kill_block_super,
-	.fs_flags	= FS_REQUIRES_DEV,
+	.fs_flags	= FS_REQUIRES_DEV | FS_CGROUP_WRITEBACK,
 };
 MODULE_ALIAS_FS("ext2");