--- include/config.h.in.orig	2011-11-23 16:42:06 UTC
+++ include/config.h.in
@@ -303,6 +303,9 @@
 /* If defined, this is a Darwin system */
 #undef VDE_DARWIN
 
+/* If defined, this is a BSDSUniX system */
+#undef VDE_BSDSUNIX
+
 /* If defined, this is a FreeBSD system */
 #undef VDE_FREEBSD