diff -Nur libiodbc-3.52.6-orig/iodbcinst/unicode.h libiodbc-3.52.6/iodbcinst/unicode.h
--- libiodbc-3.52.6-orig/iodbcinst/unicode.h	2006-01-20 16:58:35.000000000 +0100
+++ libiodbc-3.52.6/iodbcinst/unicode.h	2009-09-09 15:42:37.000000000 +0200
@@ -77,6 +77,8 @@
 #ifndef _UNICODE_H
 #define _UNICODE_H
 
+#include "config.h"
+
 #if HAVE_WCHAR_H
 #include <wchar.h>
 #endif