diff --git a/crates/types/src/traits/storage.rs b/crates/types/src/traits/storage.rs
index b52de7c66a..a2ecfdd83a 100644
--- a/crates/types/src/traits/storage.rs
+++ b/crates/types/src/traits/storage.rs
@@ -103,7 +103,7 @@ pub trait Storage<TYPES: NodeType>: Send + Sync + Clone {
         self.update_undecided_state(
             leaves
                 .iter()
-                .map(|(&commitment, &ref leaf)| {
+                .map(|(&commitment, leaf)| {
                     (
                         Commitment::from_raw(commitment.into()),
                         leaf.clone().to_leaf_unsafe(),