diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6438300fa246..582b71b7fa77 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2418,7 +2418,7 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	 * calculated f_bavail.
 	 */
 	if (!mixed && block_rsv->space_info->full &&
-	    total_free_meta - thresh < block_rsv->size)
+	    (total_free_meta < thresh || total_free_meta - thresh < block_rsv->size))
 		buf->f_bavail = 0;
 
 	buf->f_type = BTRFS_SUPER_MAGIC;