1 files changed, 12 insertions, 1 deletions
diff --git a/dom/webauthn/WebAuthnArgs.cpp b/dom/webauthn/WebAuthnArgs.cpp
index 7c78d39bef..c094a71963 100644
--- a/dom/webauthn/WebAuthnArgs.cpp
+++ b/dom/webauthn/WebAuthnArgs.cpp
@@ -155,7 +155,18 @@ WebAuthnRegisterArgs::GetTimeoutMS(uint32_t* aTimeoutMS) {
 NS_IMETHODIMP
 WebAuthnRegisterArgs::GetAttestationConveyancePreference(
     nsAString& aAttestationConveyancePreference) {
-  aAttestationConveyancePreference = mInfo.attestationConveyancePreference();
+  const nsString& attPref = mInfo.attestationConveyancePreference();
+  if (attPref.EqualsLiteral(
+          MOZ_WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_INDIRECT) ||
+      attPref.EqualsLiteral(
+          MOZ_WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_DIRECT) ||
+      attPref.EqualsLiteral(
+          MOZ_WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_ENTERPRISE)) {
+    aAttestationConveyancePreference.Assign(attPref);
+  } else {
+    aAttestationConveyancePreference.AssignLiteral(
+        MOZ_WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_NONE);
+  }
   return NS_OK;
 }