diff --git a/google/example_test.go b/google/example_test.go
index 9745be1..92bc3b4 100644
--- a/google/example_test.go
+++ b/google/example_test.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build appenginevm !appengine
+// +build appenginevm appengine
 
 package google_test