diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 5bc2a1cf73c35311013a3e97636f5366ee131a8e..c1725f20a9d1d4149ebb7b369caa9c47d951758e 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1020,7 +1020,7 @@ int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno)
 	struct dentry *dentry;
 	int ret;
 
-	if (cno < 0 || cno > nilfs->ns_cno)
+	if (cno > nilfs->ns_cno)
 		return false;
 
 	if (cno >= nilfs_last_cno(nilfs))