diff --git a/btrfs/src/v2/tree.rs b/btrfs/src/v2/tree.rs
index 0d96e14..0aecf25 100644
--- a/btrfs/src/v2/tree.rs
+++ b/btrfs/src/v2/tree.rs
@@ -339,26 +339,6 @@ impl<R: super::Read> Tree<R> {
         Ok(entry)
     }
 
-    pub fn find_key<K>(&self, key: &K) -> Result<Option<(Item, TreeItem)>>
-    where
-        K: PartialEq<Key> + PartialOrd<Key>,
-    {
-        match self.find_node(key)? {
-            Some(node) => node.parse_item().map(|item| Some(item)),
-            None => Ok(None),
-        }
-    }
-
-    pub fn find_key_rev<K>(&self, key: &K) -> Result<Option<(Item, TreeItem)>>
-    where
-        K: PartialEq<Key> + PartialOrd<Key>,
-    {
-        match self.find_node_rev(key)? {
-            Some(node) => node.parse_item().map(|item| Some(item)),
-            None => Ok(None),
-        }
-    }
-
     pub fn find_range<K>(&self, key: &K) -> Result<Range<R>>
     where
         K: PartialEq<Key> + PartialOrd<Key>,
diff --git a/btrfs/src/v2/volume.rs b/btrfs/src/v2/volume.rs
index f7c59b5..04c2d04 100644
--- a/btrfs/src/v2/volume.rs
+++ b/btrfs/src/v2/volume.rs
@@ -322,14 +322,15 @@ impl<R: super::Read> Volume2<R> {
             0x8dbfc2d2, // crc of "default"
         );
 
-        let subvol_root = root_tree
-            .find_key(&key)?
-            .ok_or(Error::NoDefaultSubvolRoot)?;
+        let subvol_root = match root_tree.entry(&key)? {
+            super::tree::entry::Entry::Occupied(entry) => Some(entry.value()?),
+            super::tree::entry::Entry::Vacant(_) => None,
+        }
+        .ok_or(Error::NoDefaultSubvolRoot)?;
         // if we found the dir entry of the "default subvol" (mharmstone nomenclature)
         // we then look for the root fs tree in the root tree with the ID found in the `.location` of the dir_item only (from mharmstone)
 
         let subvol_id = subvol_root
-            .1
             .as_dir_item()
             .expect("dir item")
             .first()