--- spectro/usbio.c.orig	2010-11-12 13:51:54.000000000 -0500
+++ spectro/usbio.c	2010-11-12 13:54:08.000000000 -0500
@@ -44,6 +44,13 @@
 
 #undef DEBUG
 
+#if !defined(USE_LIBUSB1) && defined(ENABLE_USB)
+/* hack in function to make argyll happy */
+int usb_argyll_patched(void) {
+        return 2;
+}
+#endif
+
 #ifdef ENABLE_USB
 
 /* Check a USB Vendor and product ID, and add the device */
