diff --git a/fs/mount.h b/fs/mount.h
index d64c594..a17458c 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -74,7 +74,7 @@
 static inline int is_mounted(struct vfsmount *mnt)
 {
 	/* neither detached nor internal? */
-	return !IS_ERR_OR_NULL(real_mount(mnt));
+	return !IS_ERR_OR_NULL(real_mount(mnt)->mnt_ns);
 }
 
 extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *);