diff --git a/src/pkg/net/ipraw_test.go b/src/pkg/net/ipraw_test.go
index 65defc7ea6..3cf8297e43 100644
--- a/src/pkg/net/ipraw_test.go
+++ b/src/pkg/net/ipraw_test.go
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !plan9
-
 package net
 
 import (