diff --git a/source/app/controllers/util.py b/source/app/controllers/util.py
index 6728ba3..cd8dba4 100644
--- a/source/app/controllers/util.py
+++ b/source/app/controllers/util.py
@@ -939,6 +939,7 @@ def _comprobante(doc, options):
     data = CaseInsensitiveDict(doc.attrib.copy())
     del data['certificado']
 
+    data['seriefolio'] = '{} - {}'.format(data['serie'], data['folio'])
     data['totalenletras'] = to_letters(float(data['total']), data['moneda'])
     if data['version'] == '3.3':
         tipos = {
diff --git a/source/templates/plantilla_factura.json b/source/templates/plantilla_factura.json
index 6aabf3f..2dff441 100644
--- a/source/templates/plantilla_factura.json
+++ b/source/templates/plantilla_factura.json
@@ -78,7 +78,7 @@
                 "fontSize": 8, "alignment": 0, "textColor": "black",
                 "backColor": "white"}
         },
-        "folio": {
+        "seriefolio": {
             "rectangulo": {"x": 15.1, "y": 23.2, "width": 3.0, "height": 0.4,
                 "radius": 0.0, "stroke": false, "fill": false},
             "estilo": {"name": "nombre", "fontName": "Helvetica-Bold",