diff -aur old/backend/src/cnij_backend_common.c new/backend/src/cnij_backend_common.c
--- old/backend/src/cnij_backend_common.c	2011-02-14 08:27:08.000000000 +0100
+++ new/backend/src/cnij_backend_common.c	2012-09-08 16:50:14.118801365 +0200
@@ -38,6 +38,7 @@
 // CUPS Header
 #include <cups/cups.h>
 #include <cups/ipp.h>
+#include <cups/ppd.h>
 
 // Header file for CANON
 #include "cnij_backend_common.h"
diff -aur old/cngpij/cngpij/bjcups.c new/cngpij/cngpij/bjcups.c
--- old/cngpij/cngpij/bjcups.c	2011-03-22 10:57:29.000000000 +0100
+++ new/cngpij/cngpij/bjcups.c	2012-09-08 16:48:34.042128877 +0200
@@ -21,6 +21,7 @@
 #include	<config.h>
 #endif	// HAVE_CONFIG_H
 
+#define _IPP_PRIVATE_STRUCTURES 1
 #include <cups/cups.h>
 #include <cups/language.h>
 #include <cups/ppd.h>
diff -aur old/cngpijmon/src/bjcupsmon_cups.c new/cngpijmon/src/bjcupsmon_cups.c
--- old/cngpijmon/src/bjcupsmon_cups.c	2011-03-01 06:52:18.000000000 +0100
+++ new/cngpijmon/src/bjcupsmon_cups.c	2012-09-08 16:49:30.332132152 +0200
@@ -18,8 +18,10 @@
  */
 
 /*** Includes ***/
+#define _IPP_PRIVATE_STRUCTURES 1
 #include <cups/cups.h>
 #include <cups/language.h>
+#include <cups/ppd.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <pwd.h>