diff -aur cnijfilter-source-3.20-1/backend/src/cnij_backend_common.c cnijfilter-source-3.20-1.new/backend/src/cnij_backend_common.c
--- cnijfilter-source-3.20-1/backend/src/cnij_backend_common.c	2009-05-27 07:46:41.000000000 +0200
+++ cnijfilter-source-3.20-1.new/backend/src/cnij_backend_common.c	2011-08-29 10:14:36.237186319 +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 cnijfilter-source-3.20-1/cngpijmon/src/bjcupsmon_cups.c cnijfilter-source-3.20-1.new/cngpijmon/src/bjcupsmon_cups.c
--- cnijfilter-source-3.20-1/cngpijmon/src/bjcupsmon_cups.c	2009-04-24 08:12:49.000000000 +0200
+++ cnijfilter-source-3.20-1.new/cngpijmon/src/bjcupsmon_cups.c	2011-08-29 10:17:27.667192257 +0200
@@ -19,6 +19,7 @@
 
 /*** Includes ***/
 #include <cups/cups.h>
+#include <cups/ppd.h>
 #include <cups/language.h>
 #include <sys/types.h>
 #include <unistd.h>