diff --git a/Sconstruct b/Sconstruct
index c6cc1f1..4f58b6f 100644
--- a/Sconstruct
+++ b/Sconstruct
@@ -1,4 +1,7 @@
-# Sconstruct file to build the bootloader
+# -*- mode: python -*-
+#
+# SConstruct file to build the bootloader
+#
 # Copyright (C) 2005, Giovanni Bajo
 #
 # This program is free software; you can redistribute it and/or