diff -up ftpd-topfield-0.7.4/libtopfield/usb_io.h.orig ftpd-topfield-0.7.4/libtopfield/usb_io.h
--- ftpd-topfield-0.7.4/libtopfield/usb_io.h.orig	2008-11-24 10:19:56.000000000 +0100
+++ ftpd-topfield-0.7.4/libtopfield/usb_io.h	2008-11-24 10:22:27.000000000 +0100
@@ -35,7 +35,9 @@
 #include <linux/version.h>
 
 /* linux/usb_ch9.h wasn't separated out until 2.4.23 */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,23)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+#include <linux/usb/ch9.h>
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,23)
 #include <linux/usb_ch9.h>
 #else
 #include <linux/usb.h>