diff --git a/packages/vc-handler-ld-local/src/ld-credential-module.ts b/packages/vc-handler-ld-local/src/ld-credential-module.ts
index e2cbb4ff8..4bce8b059 100644
--- a/packages/vc-handler-ld-local/src/ld-credential-module.ts
+++ b/packages/vc-handler-ld-local/src/ld-credential-module.ts
@@ -115,7 +115,7 @@ export class LdCredentialModule {
     verificationMethodId: string,
     challenge: string | undefined,
     domain: string | undefined,
-    purpose: typeof ProofPurpose = !challenge && !domain
+    purpose: typeof ProofPurpose = !challenge // domain is not a mandatory var for AuthenticationProofPurpose per se, but challenge is.
       ? new AssertionProofPurpose()
       : new AuthenticationProofPurpose({
           domain,
@@ -212,7 +212,7 @@ export class LdCredentialModule {
     domain: string | undefined,
     context: IAgentContext<RequiredAgentMethods>,
     fetchRemoteContexts = false,
-    presentationPurpose: typeof ProofPurpose = !challenge && !domain
+    presentationPurpose: typeof ProofPurpose = !challenge // domain is not a mandatory var for AuthenticationProofPurpose per se, but challenge is.
       ? new AssertionProofPurpose()
       : new AuthenticationProofPurpose({ domain, challenge }),
     checkStatus?: Function,