diff --git a/fs/namespace.c b/fs/namespace.c
index 580877e46b1a..a052f847c5df 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1254,6 +1254,7 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
 
 	mnt->mnt.mnt_flags = READ_ONCE(old->mnt.mnt_flags) &
 			     ~MNT_INTERNAL_FLAGS;
+	mnt->mnt_t_flags = old->mnt_t_flags & T_UNBINDABLE;
 
 	if (flag & (CL_SLAVE | CL_PRIVATE))
 		mnt->mnt_group_id = 0; /* not a peer of original */