diff --git a/builders/windows-builder.py b/builders/windows-builder.py
index 2212ee4..4ba2e8b 100644
--- a/builders/windows-builder.py
+++ b/builders/windows-builder.py
@@ -156,7 +156,10 @@ class WindowsBuilder(Builder):
                 source_id = md5(source.encode('utf8')).hexdigest()
                 file_id = 'file_{source_id}'.format(source_id=source_id)
                 component_id = 'cmp_{source_id}'.format(source_id=source_id)
-                file_ = E.File(Id=file_id, KeyPath="yes", Source=source)
+                if self.arch == 'x64':
+                    file_ = E.File(Id=file_id, KeyPath="yes", Source=source, ProcessorArchitecture='x64')
+                else:
+                    file_ = E.File(Id=file_id, KeyPath="yes", Source=source)
                 component = E.Component(file_, Id=component_id, Guid='*')
                 element.append(component)
                 components.append(component)