diff -urN cnijfilter-source-3.70-1.old/backend/src/cnij_backend_common.c cnijfilter-source-3.70-1/backend/src/cnij_backend_common.c
--- cnijfilter-source-3.70-1.old/backend/src/cnij_backend_common.c	2012-12-22 11:09:21.674631729 +0100
+++ cnijfilter-source-3.70-1/backend/src/cnij_backend_common.c	2012-12-22 11:11:31.903619656 +0100
@@ -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"