diff --git a/src/test/Trac664.rb b/src/test/Trac664.rb
index d0ca94995..0d01ae769 100644
--- a/src/test/Trac664.rb
+++ b/src/test/Trac664.rb
@@ -29,7 +29,7 @@
 unless res.length >= 1; raise 'err;'; end # 1 on Solaris, 2 on Linux
 
 elem = res[0]
-unless elem[0] == "AF_INET" && elem[1] == 80
+unless %w[ AF_INET AF_INET6 ].include?(elem[0]) && elem[1] == 80
   raise "error: expected 'AF_INET' and port 80: actual #{elem[0]} #{elem[1]}"
 end