diff --git a/crates/trie/parallel/benches/root.rs b/crates/trie/parallel/benches/root.rs
index 8361fdc20546..744683b9a586 100644
--- a/crates/trie/parallel/benches/root.rs
+++ b/crates/trie/parallel/benches/root.rs
@@ -83,7 +83,7 @@ pub fn calculate_state_root(c: &mut Criterion) {
                         blocking_pool.clone(),
                         Default::default(),
                         updated_state.clone(),
-                        updated_state.construct_prefix_sets(),
+                        updated_state.construct_prefix_sets().freeze(),
                     )
                 },
                 |calculator| calculator.incremental_root(),
diff --git a/crates/trie/parallel/src/async_root.rs b/crates/trie/parallel/src/async_root.rs
index ead10e600105..600a3b9a2b96 100644
--- a/crates/trie/parallel/src/async_root.rs
+++ b/crates/trie/parallel/src/async_root.rs
@@ -343,7 +343,7 @@ mod tests {
             }
         }
 
-        let prefix_sets = hashed_state.construct_prefix_sets();
+        let prefix_sets = hashed_state.construct_prefix_sets().freeze();
         assert_eq!(
             AsyncStateRoot::new(
                 consistent_view.clone(),