diff --git a/pos/static/js/config.js b/pos/static/js/config.js
index 5fcb571..d690dde 100644
--- a/pos/static/js/config.js
+++ b/pos/static/js/config.js
@@ -964,14 +964,17 @@ const Config = (() => {
     }
 
     async function saveModules() {
-        var btn = event.target;
-        if (btn) { btn.disabled = true; btn.textContent = 'Guardando...'; }
+        var cbWa = document.getElementById('cfg-module-whatsapp');
+        var cbMp = document.getElementById('cfg-module-marketplace');
+        var cbMeli = document.getElementById('cfg-module-meli');
+        var cbCat = document.getElementById('cfg-module-catalog');
+        if (!cbWa && !cbMp && !cbMeli && !cbCat) return;
         try {
             var data = {
-                whatsapp: document.getElementById('cfg-module-whatsapp').checked,
-                marketplace: document.getElementById('cfg-module-marketplace').checked,
-                meli: document.getElementById('cfg-module-meli').checked,
-                catalog: document.getElementById('cfg-module-catalog').checked,
+                whatsapp: cbWa ? cbWa.checked : true,
+                marketplace: cbMp ? cbMp.checked : true,
+                meli: cbMeli ? cbMeli.checked : true,
+                catalog: cbCat ? cbCat.checked : true,
             };
             var res = await fetch(API + '/modules', {
                 method: 'PUT',
@@ -986,8 +989,6 @@ const Config = (() => {
             toast('Módulos actualizados');
         } catch (e) {
             toast(e.message, 'error');
-        } finally {
-            if (btn) { btn.disabled = false; btn.textContent = 'Guardar módulos'; }
         }
     }
 
diff --git a/pos/templates/config.html b/pos/templates/config.html
index 98aca52..864e274 100644
--- a/pos/templates/config.html
+++ b/pos/templates/config.html
@@ -928,7 +928,7 @@
   <script src="/pos/static/js/pos-utils.js?v=33" defer></script>
   <script src="/pos/static/js/sidebar.js" defer></script>
   <script src="/pos/static/js/kiosk.js" defer></script>
-  <script src="/pos/static/js/config.js?v=34" defer></script>
+  <script src="/pos/static/js/config.js?v=35" defer></script>
   <script src="/pos/static/js/sync-engine.js" defer></script>
   <script>if('serviceWorker' in navigator){navigator.serviceWorker.register('/pos/sw.js',{scope:'/pos/'});}</script>
   <script src="/pos/static/js/pwa-install.js" defer></script>