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