diff -ur prboom-plus-2.5.0.3.orig/src/r_demo.c prboom-plus-2.5.0.3/src/r_demo.c

--- prboom-plus-2.5.0.3.orig/src/r_demo.c	2009-06-11 13:25:42 +0300

+++ prboom-plus-2.5.0.3/src/r_demo.c	2009-07-31 03:42:56 +0300

@@ -156,7 +156,7 @@

 #ifndef _MSC_VER

 #ifdef HAVE_LIBPCREPOSIX

-#include "pcreposix.h"

+#include "pcre/pcreposix.h"

 #endif

 #else // _MSC_VER

 #define HAVE_LIBPCREPOSIX 1