diff --git a/src/topsapp/api.js b/src/topsapp/api.js
index 2c16784..7c8502d 100644
--- a/src/topsapp/api.js
+++ b/src/topsapp/api.js
@@ -842,7 +842,9 @@ class TopSappAPI {
     async atualizarFTTH(idCliente, idServico, ftthData, location = '', credentials) {
         const instance = this.getInstanceByLocation(location);
         try {
+            const session = await this.getValidSession(instance, credentials);
             return await this.makeRequest('AlterarServico', {
+                idUsuario: session.idUsuario || 1,
                 idCliente: parseInt(idCliente),
                 idServico: parseInt(idServico),
                 ...ftthData