diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index d063379a031d..c0ff0c2fc01d 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1468,7 +1468,7 @@ static int btrfs_fill_super(struct super_block *sb,
 
 	err = open_ctree(sb, fs_devices, (char *)data);
 	if (err) {
-		btrfs_err(fs_info, "open_ctree failed");
+		btrfs_err(fs_info, "open_ctree failed: %d", err);
 		return err;
 	}