diff -uwr libusb_vhci-0.6.orig/src/local_hcd.cpp libusb_vhci-0.6/src/local_hcd.cpp
--- libusb_vhci-0.6.orig/src/local_hcd.cpp	2012-05-18 11:52:17.097659487 +0100
+++ libusb_vhci-0.6/src/local_hcd.cpp	2012-05-18 11:52:45.161659975 +0100
@@ -21,6 +21,7 @@
 #endif
 
 #include <stdlib.h>
+#include <unistd.h>
 #include <new>
 #include "libusb_vhci.h"