diff --git a/auto/unix b/auto/unix
index 8982968..37bb5d2 100755
--- a/auto/unix
+++ b/auto/unix
@@ -2,6 +2,9 @@
 # Copyright (C) Igor Sysoev
 
 
+have=NGX_HAVE_UNIX_DOMAIN . auto/have
+
+
 CC_WARN=
 ngx_fmt_collect=yes