diff --git a/SConstruct b/SConstruct
index 000fee3e..5a856959 100644
--- a/SConstruct
+++ b/SConstruct
@@ -105,8 +105,6 @@ libvmime_sources = [
 	'encoding.cpp', 'encoding.hpp',
 	'exception.cpp', 'exception.hpp',
 	'fileAttachment.cpp', 'fileAttachment.hpp',
-	'genericField.hpp',
-	'genericParameter.hpp',
 	'header.cpp', 'header.hpp',
 	'headerFieldFactory.cpp', 'headerFieldFactory.hpp',
 	'headerField.cpp', 'headerField.hpp',
@@ -131,8 +129,6 @@ libvmime_sources = [
 	'platformDependant.cpp', 'platformDependant.hpp',
 	'propertySet.cpp', 'propertySet.hpp',
 	'relay.cpp', 'relay.hpp',
-	'standardFields.hpp',
-	'standardParams.hpp',
 	'stringContentHandler.cpp', 'stringContentHandler.hpp',
 	'streamContentHandler.cpp', 'streamContentHandler.hpp',
 	'text.cpp', 'text.hpp',