diff -ruN main.cxx.old main.cxx
--- main.cxx.old	2004-04-17 07:43:43.000000000 -0400
+++ main.cxx	2008-01-05 21:37:07.000000000 -0500
@@ -18,6 +18,10 @@
 
 
 #include <ptlib.h>
+/* the following were expected to be included within ptlib.h
+   but in case they weren't include them explicitly here. */
+#include <ptlib/pprocess.h>
+
 #include "gk.h"
 
 PCREATE_PROCESS(Gatekeeper)