diff -Nru brltty-6.5.orig/Programs/usb_solaris.c brltty-6.5/Programs/usb_solaris.c
--- brltty-6.5.orig/Programs/usb_solaris.c	2022-04-28 20:34:10.000000000 +0000
+++ brltty-6.5/Programs/usb_solaris.c	2022-09-28 18:39:23.236003020 +0000
@@ -27,6 +27,7 @@
 #include <sys/usb/clients/ugen/usb_ugen.h>
 
 #include "log.h"
+#include "bitfield.h"
 #include "io_usb.h"
 #include "usb_internal.h"