diff -u -r ../mutt-1.6.0/getdomain.c ./getdomain.c
--- ../mutt-1.6.0/getdomain.c	2016-04-02 14:12:22.000000000 -0400
+++ ./getdomain.c	2016-04-06 06:18:24.614628451 -0400
@@ -44,7 +44,9 @@
   hints.ai_flags = AI_CANONNAME;
   hints.ai_family = AF_UNSPEC;
 
+#ifdef _SC_HOST_NAME_MAX
   if ((node_len = sysconf(_SC_HOST_NAME_MAX)) == -1)
+#endif
     node_len = STRING;
   node = safe_malloc(node_len + 1);
   if (gethostname(node, node_len))