--- sane-backends-1.0.22.orig/backend/hp3900_rts8822.c	2010-12-02 00:49:58.000000000 +0100
+++ sane-backends-1.0.22/backend/hp3900_rts8822.c	2014-03-18 08:38:21.000000000 +0100
@@ -64,6 +64,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>		/* bzero()   */
+#include <sys/types.h>
 #include <time.h>		/* clock()   */
 #include <math.h>		/* truncf()  */
 #include <ctype.h>		/* tolower() */