diff --git a/config/cloudinit/datasource/vmware/vmware_test.go b/config/cloudinit/datasource/vmware/vmware_test.go
index 44d85f72..3ec0f170 100644
--- a/config/cloudinit/datasource/vmware/vmware_test.go
+++ b/config/cloudinit/datasource/vmware/vmware_test.go
@@ -1,3 +1,4 @@
+// +build amd64
 // Copyright 2015 CoreOS, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");