diff --git a/yarn-project/acir-simulator/src/acvm/oracle/typed_oracle.ts b/yarn-project/acir-simulator/src/acvm/oracle/typed_oracle.ts
index 28a6cfe350b..228775e6d2d 100644
--- a/yarn-project/acir-simulator/src/acvm/oracle/typed_oracle.ts
+++ b/yarn-project/acir-simulator/src/acvm/oracle/typed_oracle.ts
@@ -113,7 +113,7 @@ export abstract class TypedOracle {
     throw new Error('Not available.');
   }
 
-  getMembershipWitness(_commitment: Fr): Promise<Fr[]> {
+  getMembershipWitness(_leafValue: Fr): Promise<Fr[]> {
     throw new Error('Not available.');
   }