diff --git a/source/static/js/controller/invoices.js b/source/static/js/controller/invoices.js
index 5d1ab53..05e37ac 100644
--- a/source/static/js/controller/invoices.js
+++ b/source/static/js/controller/invoices.js
@@ -1408,5 +1408,14 @@ function lst_tipo_relacion_change(nv, ov){
 
 
 function lst_serie_change(nv, ov){
-        show(nv)
+    query = table_series.chain().find({id: nv}).data()[0]
+    if(query.usarcon){
+        $$('lst_tipo_comprobante').setValue(query.usarcon)
+        $$('lst_tipo_comprobante').config.readonly = true
+    }else{
+        $$('lst_tipo_comprobante').setValue('I')
+        $$('lst_tipo_comprobante').config.readonly = false
+    }
+    $$('lst_tipo_comprobante').refresh()
 }
+