diff --git a/packages/auth-client/src/index.ts b/packages/auth-client/src/index.ts
index 4c6eadf6a..ccf2272ef 100644
--- a/packages/auth-client/src/index.ts
+++ b/packages/auth-client/src/index.ts
@@ -307,6 +307,7 @@ export class AuthClient {
   private _getEventHandler(identityProviderUrl: URL, options?: AuthClientLoginOptions) {
     return async (event: MessageEvent) => {
       if (event.origin !== identityProviderUrl.origin) {
+        console.warn(`WARNING: expected origin '${identityProviderUrl.origin}', got '${event.origin}' (ignoring)`);
         return;
       }