--- src/cnijfilter-common-3.00/backend/src/cnij_backend_common.c	2008-09-01 10:05:44.000000000 +0200
+++ src-patched/cnijfilter-common-3.00/backend/src/cnij_backend_common.c	2012-05-06 17:38:40.000000000 +0200
@@ -39,6 +39,7 @@
 // CUPS Header
 #include <cups/cups.h>
 #include <cups/ipp.h>
+#include <cups/ppd.h>
 
 // Header file for CANON
 #include "cnij_backend_common.h"
--- src/cnijfilter-common-3.00/cngpijmon/src/bjcupsmon_cups.c	2008-09-02 12:28:24.000000000 +0200
+++ src-patched/cnijfilter-common-3.00/cngpijmon/src/bjcupsmon_cups.c	2012-05-06 17:39:20.000000000 +0200
@@ -21,6 +21,7 @@
 /*** Includes ***/
 #include <cups/cups.h>
 #include <cups/language.h>
+#include <cups/ppd.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <pwd.h>