diff --git a/packages/oauth/oauth-provider/src/router/create-authorization-page-middleware.ts b/packages/oauth/oauth-provider/src/router/create-authorization-page-middleware.ts
index f653b0353..45c45fac1 100644
--- a/packages/oauth/oauth-provider/src/router/create-authorization-page-middleware.ts
+++ b/packages/oauth/oauth-provider/src/router/create-authorization-page-middleware.ts
@@ -53,7 +53,7 @@ export function createAuthorizationPageMiddleware<
       res.setHeader('Cache-Control', 'no-store')
       res.setHeader('Pragma', 'no-cache')
 
-      validateFetchSite(req, ['cross-site', 'none'])
+      validateFetchSite(req, ['cross-site', 'same-site', 'none'])
       validateFetchMode(req, ['navigate'])
       validateFetchDest(req, ['document'])
       validateOrigin(req, issuerOrigin)