--- backend/src/cnij_backend_common.c	2012-06-01 14:45:19.251673478 +0200
+++ backend/src/cnij_backend_common.c	2012-06-01 14:46:13.486995445 +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"