diff --git a/test/fixedbugs/bug243.go b/test/fixedbugs/bug243.go
index 837b91035f..30dbc4ed4d 100644
--- a/test/fixedbugs/bug243.go
+++ b/test/fixedbugs/bug243.go
@@ -15,7 +15,7 @@ import (
 
 func main() {
 	os.Stdout.Close()
-	var listen, _ = net.Listen("tcp", ":0")
+	var listen, _ = net.Listen("tcp", "127.0.0.1:0")
 
 	go func() {
 		for {