diff --git a/src/module/webauthn-validator/types.ts b/src/module/webauthn-validator/types.ts
index 854327c..9c2de3e 100644
--- a/src/module/webauthn-validator/types.ts
+++ b/src/module/webauthn-validator/types.ts
@@ -9,7 +9,7 @@ export type WebauthnCredential = {
 export type WebauthnValidatorSignature = {
   webauthn: WebAuthnData
   signature: WebauthnSignature | Hex | Uint8Array
-  usePrecompiled: boolean
+  usePrecompiled?: boolean
 }
 
 export type WebAuthnData = {
diff --git a/src/module/webauthn-validator/usage.ts b/src/module/webauthn-validator/usage.ts
index 1d941d1..9b88b91 100644
--- a/src/module/webauthn-validator/usage.ts
+++ b/src/module/webauthn-validator/usage.ts
@@ -5,7 +5,7 @@ import { parseSignature } from './utils'
 export const getWebauthnValidatorSignature = ({
   webauthn,
   signature,
-  usePrecompiled,
+  usePrecompiled = false,
 }: WebauthnValidatorSignature) => {
   const { authenticatorData, clientDataJSON, typeIndex } = webauthn
   let r: bigint