diff --git a/iscan-free/sanei/sanei_pio.c b/iscan-free/sanei/sanei_pio.c

index a2073be..a800e05 100644

--- a/sanei/sanei_pio.c

+++ b/sanei/sanei_pio.c

@@ -73,7 +73,7 @@

 #elif HAVE_SYS_HW_H

 # include <sys/hw.h>

 #elif defined(__i386__)  && defined (__GNUC__)

-

+#include <sys/types.h>

 static __inline__ void

 outb (u_char value, u_long port)

 {