diff --git a/types/auth0-js/auth0-js-tests.ts b/types/auth0-js/auth0-js-tests.ts
index 9e41f26c3d..c6ab14a972 100644
--- a/types/auth0-js/auth0-js-tests.ts
+++ b/types/auth0-js/auth0-js-tests.ts
@@ -57,7 +57,8 @@ webAuth.parseHash(
             PPoh-pITcZ8qbF5l5rMZwXiwk5efbESuqZ0IfMUcamB6jdgLwTxq-HpOT_x5q6-sO1PBHchpSo1WHeDYMlRrOFd9bh741sUuBuXdPQZ3Zb0i2sNOAC2RFB \
             1E11mZn7uNvVPGdPTg-Y5xppz30GSXoOJLbeBszfrVDCmPhpHKGGMPL1N6HV-3EEF77L34YNAi2JQ-b70nFK_dnYmmv0cYTGUxtGTHkl64UEDLi3u7bV- \
             kbGky3iOOCzXKzDDY6BBKpCRTc2KlbrkO2A2PuDn27WVv1QCNEFHvJN7HxiDDzXOsaUmjrQ3sfrHhzD7S9BcCRkekRfD9g95SKD5J0Fj8NA& \
-            token_type=Bearer&state=theState&refresh_token=kajshdgfkasdjhgfas&scope=foo"
+            token_type=Bearer&state=theState&refresh_token=kajshdgfkasdjhgfas&scope=foo",
+        __enableIdPInitiatedLogin: true,
     },
     (err, authResult) => {
     if (err) {
diff --git a/types/auth0-js/index.d.ts b/types/auth0-js/index.d.ts
index 15bc8b142f..31b97e528d 100644
--- a/types/auth0-js/index.d.ts
+++ b/types/auth0-js/index.d.ts
@@ -748,6 +748,8 @@ export interface ParseHashOptions {
     state?: string;
     nonce?: string;
     _idTokenVerification?: boolean;
+    /** indicates that you want to allow IdP-Initiated flows. See {@link https://auth0.com/docs/protocols/saml/idp-initiated-sso#lock-auth0-js} */
+    __enableIdPInitiatedLogin?: boolean;
 }
 
 export interface RenewAuthOptions {