diff --git a/facho/fe/fe.py b/facho/fe/fe.py
index b137731..51e73b2 100644
--- a/facho/fe/fe.py
+++ b/facho/fe/fe.py
@@ -91,7 +91,8 @@ class FeXML(FachoXML):
         xmlns_name = {v: k for k, v in NAMESPACES.items()}[root_namespace]
         return super().tostring(**kw)\
             .replace(xmlns_name + ':', '')\
-            .replace('xmlns:'+xmlns_name, 'xmlns')
+            .replace('xmlns:'+xmlns_name, 'xmlns')\
+            .replace('schemaLocation', 'xsi:schemaLocation')
 
 class DianXMLExtensionCUDFE(FachoXMLExtension):
 
diff --git a/facho/fe/nomina/__init__.py b/facho/fe/nomina/__init__.py
index 3f5c71c..4708a84 100644
--- a/facho/fe/nomina/__init__.py
+++ b/facho/fe/nomina/__init__.py
@@ -320,9 +320,12 @@ class DIANNominaXML:
 
         self.tag_document = tag_document
         self.fexml = fe.FeXML(tag_document, 'dian:gov:co:facturaelectronica:NominaIndividual')
+        
+        schemaLocation = "dian:gov:co:facturaelectronica:NominaIndividual NominaIndividualElectronicaXSD.xsd"
 
         if schemaLocation is not None:
-            self.fexml.root.set("SchemaLocation", schemaLocation)            
+            self.fexml.root.set("SchemaLocation", "")
+            self.fexml.root.set("schemaLocation", schemaLocation)            
 
         # layout, la dian requiere que los elementos
         # esten ordenados segun el anexo tecnico