diff --git a/test/fixedbugs/issue15609.go b/test/fixedbugs/issue15609.go
index 87c96b480f..e0bf8a42d8 100644
--- a/test/fixedbugs/issue15609.go
+++ b/test/fixedbugs/issue15609.go
@@ -1,5 +1,7 @@
 // runindir
 
+// +build !nacl
+
 // Copyright 2019 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.