diff --git a/facho/fe/nomina/__init__.py b/facho/fe/nomina/__init__.py
index 9acd574..96156a2 100644
--- a/facho/fe/nomina/__init__.py
+++ b/facho/fe/nomina/__init__.py
@@ -172,6 +172,16 @@ class InformacionGeneral:
             CUNE = cune_hash
         )
 
+class DianXMLExtensionSigner(fe.DianXMLExtensionSigner):
+
+    def __init__(self, pkcs12_path, passphrase=None, mockpolicy=False):
+        super().__init__(pkcs12_path, passphrase=passphrase, mockpolicy=mockpolicy)
+
+    def build(self, fachoxml):
+        signature = self.sign_xml_element(fachoxml.root)
+        xpath = fachoxml.xpath_from_root('/ext:UBLExtensions/ext:UBLExtension/ext:ExtensionContent')
+        extcontent = fachoxml.get_element(xpath)
+        fachoxml.append_element(extcontent, signature)
 
 class DIANNominaXML:
     def __init__(self, tag_document):
@@ -180,7 +190,7 @@ class DIANNominaXML:
 
         # layout, la dian requiere que los elementos
         # esten ordenados segun el anexo tecnico
-        self.fexml.placeholder_for('./UBLExtensions')
+        self.fexml.placeholder_for('./ext:UBLExtensions/ext:UBLExtension/ext:ExtensionContent')
         self.fexml.placeholder_for('./Novedad', optional=True)
         self.fexml.placeholder_for('./Periodo')
         self.fexml.placeholder_for('./NumeroSecuenciaXML')
diff --git a/tests/test_nomina.py b/tests/test_nomina.py
index 961f9b2..f575d0e 100644
--- a/tests/test_nomina.py
+++ b/tests/test_nomina.py
@@ -9,6 +9,15 @@ import pytest
 
 from facho import fe
 
+import helpers
+
+def assert_error(errors, msg):
+    for error in errors:
+        if str(error) == msg:
+            return True
+
+    raise "wants error: %s" % (msg)
+
 def test_adicionar_devengado_Basico():
     nomina = fe.nomina.DIANNominaIndividual()
 
@@ -210,13 +219,6 @@ def test_nomina_xml():
     assert xml.get_element_text_or_attribute('/fe:NominaIndividual/ProveedorXML/@SoftwareSC') == 'yy'
     assert xml.get_element_text_or_attribute('/fe:NominaIndividual/ProveedorXML/@CodigoQR') != None
 
-def assert_error(errors, msg):
-    for error in errors:
-        if str(error) == msg:
-            return True
-
-    raise "wants error: %s" % (msg)
-
 
 def test_asignar_pago():
     nomina = fe.nomina.DIANNominaIndividual()
@@ -224,3 +226,16 @@ def test_asignar_pago():
         forma = fe.nomina.FormaPago(code='1'),
         metodo = fe.nomina.MetodoPago(code='1')
     ))
+
+def test_nomina_xmlsign(monkeypatch):
+    nomina = fe.nomina.DIANNominaIndividual()
+    xml = nomina.toFachoXML()
+
+    signer = fe.nomina.DianXMLExtensionSigner('./tests/example.p12')
+    with monkeypatch.context() as m:
+        helpers.mock_urlopen(m)
+        xml.add_extension(signer)
+
+    print(xml.tostring())
+    elem = xml.get_element('/fe:NominaIndividual/ext:UBLExtensions/ext:UBLExtension/ext:ExtensionContent/ds:Signature')
+    assert elem is not None