diff --git a/defaulttraits.h b/defaulttraits.h
index 5032f7d..734bcea 100644
--- a/defaulttraits.h
+++ b/defaulttraits.h
@@ -2,7 +2,7 @@
 // (C) Jan de Vaan 2007-2010, all rights reserved. See the accompanying "License.txt" for licensed use. 
 // 
 
-
+#include "header.h"
 #ifndef CHARLS_DEFAULTTRAITS
 #define CHARLS_DEFAULTTRAITS
 
