diff --git a/vl.h b/vl.h
index 543d579..e1a2ec3 100644
--- a/vl.h
+++ b/vl.h
@@ -135,6 +135,7 @@
 extern const char *keyboard_layout;
 extern int kqemu_allowed;
 extern int win2k_install_hack;
+extern int usb_enabled;
 
 /* XXX: make it dynamic */
 #if defined (TARGET_PPC)
@@ -859,6 +860,8 @@
 extern ADBBusState adb_bus;
 int cuda_init(SetIRQFunc *set_irq, void *irq_opaque, int irq);
 
+#include "hw/usb.h"
+
 #endif /* defined(QEMU_TOOL) */
 
 /* monitor.c */