diff --git a/test/mapnan.go b/test/mapnan.go
index 8974540026..60b35fbeaf 100644
--- a/test/mapnan.go
+++ b/test/mapnan.go
@@ -1,4 +1,4 @@
-// +build darwin,linux
+// +build darwin linux
 // run
 
 // Copyright 2013 The Go Authors. All rights reserved.