$OpenBSD$
--- src/unix/Construct.orig	Tue Aug 10 18:17:01 2010
+++ src/unix/Construct	Sun Aug 15 00:14:02 2010
@@ -112,6 +112,7 @@ else
 # NOTE TTimo using -fshort-enums increases warnings on enum issues
 #   this is for debugging and QA ONLY, the flag has ABI issues (OpenGL headers)
 #$COMMON_CFLAGS = $COMMON_CFLAGS . '-fshort-enums ';
+$COMMON_CFLAGS = $COMMON_CFLAGS . '-I/usr/X11R6/include ';
 
 if ($config eq 'debug')
 {
