diff -ur libusb-1.0.0/libusb/os/linux_usbfs.c libusb-1.0.0-mod/libusb/os/linux_usbfs.c
--- libusb-1.0.0/libusb/os/linux_usbfs.c	2008-12-13 20:43:20.000000000 +0100
+++ libusb-1.0.0-mod/libusb/os/linux_usbfs.c	2009-04-30 04:25:12.000000000 +0200
@@ -1295,7 +1295,8 @@
 			urb->buffer_length = transfer->length % MAX_BULK_BUFFER_LENGTH;
 		else
 			urb->buffer_length = MAX_BULK_BUFFER_LENGTH;
-
+		if ((!(transfer->endpoint & LIBUSB_ENDPOINT_DIR_MASK)) && (i == num_urbs - 1))
+			urb->flags = USBFS_URB_ZLP;
 		r = ioctl(dpriv->fd, IOCTL_USBFS_SUBMITURB, urb);
 		if (r < 0) {
 			int j;
diff -ur libusb-1.0.0/libusb/os/linux_usbfs.h libusb-1.0.0-mod/libusb/os/linux_usbfs.h
--- libusb-1.0.0/libusb/os/linux_usbfs.h	2008-07-16 16:17:57.000000000 +0200
+++ libusb-1.0.0-mod/libusb/os/linux_usbfs.h	2009-04-30 04:08:27.000000000 +0200
@@ -63,6 +63,7 @@
 #define USBFS_URB_DISABLE_SPD	1
 #define USBFS_URB_ISO_ASAP	2
 #define USBFS_URB_QUEUE_BULK	0x10
+#define USBFS_URB_ZLP	0x40
 
 enum usbfs_urb_type {
 	USBFS_URB_TYPE_ISO = 0,