--- brltty-3.9/Programs/auth.c	2007-10-17 08:19:24.000000000 -0700
+++ brltty-3.9/Programs/auth.c.new	2008-07-03 14:42:20.000000000 -0700
@@ -50,6 +50,9 @@
 /* peer credentials */
 #undef CAN_CHECK_CREDENTIALS
 
+/* workaround build error (http://www.mail-archive.com/brltty@mielke.cc/msg01377.html) */
+#undef SO_PEERCRED
+
 typedef struct {
 #ifdef __MINGW32__
   const char *name;