diff --git a/src/lhisp-oauth-client.ts b/src/lhisp-oauth-client.ts
index 2d45b7b..fd62132 100644
--- a/src/lhisp-oauth-client.ts
+++ b/src/lhisp-oauth-client.ts
@@ -52,7 +52,7 @@ export class LhispOauthClient<iAccessToken extends AccessToken = AccessToken> {
     this.certificado = params.certificado;
     this.headers = (params.headers ? params.headers : {}) as any as AxiosHeaders;
     this.authHeaders = (params.authHeaders ? params.authHeaders : {}) as any as AxiosHeaders;
-    this.authData = params.authData;
+    this.authData = params.authData || {};
     this.apiUrl = params.apiUrl;
     this.authUrl = params.authUrl;
     this.authScope = params.authScope;