diff --git a/fs/mount.h b/fs/mount.h
index ad4b1ddebb54..0a78f85cf737 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -153,5 +153,4 @@ static inline void move_from_ns(struct mount *mnt, struct list_head *dt_list)
 	list_add_tail(&mnt->mnt_list, dt_list);
 }
 
-extern void mnt_cursor_del(struct mnt_namespace *ns, struct mount *cursor);
 bool has_locked_children(struct mount *mnt, struct dentry *dentry);