diff --git a/src/rstd/collections/tree.rs b/src/rstd/collections/tree.rs
index 2954276..da54f7c 100644
--- a/src/rstd/collections/tree.rs
+++ b/src/rstd/collections/tree.rs
@@ -159,11 +159,7 @@ impl<'a, Ctx: Context<'a>, F: Factory<'a, Ctx>> Factory<'a, Ctx> for TreeFactory
     type ParseError = TreeParseError<F::ParseError>;
 
     fn deserialize(&self, inctx: impl InCtx<'a, Ctx>) -> ParseResult<'a, Ctx, Self> {
-        let (node, inctx) = self.0.ideserialize(inctx)?;
-        let height = u64::a_deserialize(inctx)?;
-        let tree = Tree { node, height };
-        tree.validate_height()?;
-        Ok(tree)
+        self.ideserialize(inctx).seal()
     }
 
     fn extend(&self, mut mentionable: Self::Mtbl, tail: &[u8]) -> ParseResult<'a, Ctx, Self> {