diff --git a/noir-projects/noir-protocol-circuits/crates/types/src/storage/map.nr b/noir-projects/noir-protocol-circuits/crates/types/src/storage/map.nr
index 13a82bc58b58..33b7c4443eda 100644
--- a/noir-projects/noir-protocol-circuits/crates/types/src/storage/map.nr
+++ b/noir-projects/noir-protocol-circuits/crates/types/src/storage/map.nr
@@ -1,7 +1,7 @@
-use crate::{hash::pedersen_hash, traits::ToField};
+use crate::{hash::poseidon2_hash, traits::ToField};
 
 pub fn derive_storage_slot_in_map<K>(storage_slot: Field, key: K) -> Field where K: ToField {
-    pedersen_hash([storage_slot, key.to_field()], 0)
+    poseidon2_hash([storage_slot, key.to_field()])
 }
 
 mod test {
diff --git a/yarn-project/circuits.js/src/hash/map_slot.ts b/yarn-project/circuits.js/src/hash/map_slot.ts
index d14b85b0ea9f..12b055b8fddc 100644
--- a/yarn-project/circuits.js/src/hash/map_slot.ts
+++ b/yarn-project/circuits.js/src/hash/map_slot.ts
@@ -1,4 +1,4 @@
-import { pedersenHash } from '@aztec/foundation/crypto';
+import { poseidon2Hash } from '@aztec/foundation/crypto';
 import { type Fr } from '@aztec/foundation/fields';
 
 /**
@@ -14,5 +14,5 @@ export function deriveStorageSlotInMap(
     toField: () => Fr;
   },
 ): Fr {
-  return pedersenHash([mapSlot, key.toField()]);
+  return poseidon2Hash([mapSlot, key.toField()], 0);
 }