diff -up hplip-3.11.5/prnt/hpps/hppsfilter.c.cups15 hplip-3.11.5/prnt/hpps/hppsfilter.c
--- hplip-3.11.5/prnt/hpps/hppsfilter.c.cups15	2011-06-10 11:44:25.933781345 +0100
+++ hplip-3.11.5/prnt/hpps/hppsfilter.c	2011-06-10 11:46:24.474510996 +0100
@@ -38,6 +38,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <cups/cups.h>
+#include <cups/ppd.h>
 #include <sys/types.h>
 #include <sys/stat.h>