--- gts-0.7.6/examples/happrox.c.orig	2013-07-18 01:06:36.639821563 +0200
+++ gts-0.7.6/examples/happrox.c	2013-07-18 01:06:45.168741230 +0200
@@ -21,7 +21,7 @@
 #include <stdlib.h>
 #include <locale.h>
 #include <string.h>
-#include <pgm.h>
+#include <netpbm/pgm.h>
 #include "config.h"
 #ifdef HAVE_GETOPT_H
 #  include <getopt.h>