diff --git a/include/g_dnl.h b/include/g_dnl.h
index 4eeb5e4..ba49f1f 100644
--- a/include/g_dnl.h
+++ b/include/g_dnl.h
@@ -34,6 +34,7 @@
 };
 
 int g_dnl_bind_fixup(struct usb_device_descriptor *, const char *);
+int g_dnl_get_board_bcd_device_number(int gcnum);
 int g_dnl_board_usb_cable_connected(void);
 int g_dnl_register(const char *s);
 void g_dnl_unregister(void);