diff --git a/src/lib/users/guards/iqser-auth-guard.service.ts b/src/lib/users/guards/iqser-auth-guard.service.ts
index a68692b..a861762 100644
--- a/src/lib/users/guards/iqser-auth-guard.service.ts
+++ b/src/lib/users/guards/iqser-auth-guard.service.ts
@@ -18,10 +18,13 @@ export class IqserAuthGuard extends KeycloakAuthGuard {
     async isAccessAllowed(route: ActivatedRouteSnapshot): Promise<boolean> {
         if (!this.authenticated) {
             const kcIdpHint = route.queryParamMap.get('kc_idp_hint');
-            await this._keycloak.login({
-                idpHint: kcIdpHint ?? this._configService.values.OAUTH_IDP_HINT,
+            const options: any = {
                 redirectUri: window.location.href,
-            });
+            };
+            if (kcIdpHint ?? this._configService.values.OAUTH_IDP_HINT) {
+                options.idpHint = kcIdpHint ?? this._configService.values.OAUTH_IDP_HINT;
+            }
+            await this._keycloak.login(options);
             return false;
         }