diff --git a/pkg/osutil/findproc_appengine.go b/pkg/osutil/findproc_appengine.go
index 365b69581..4da511c47 100644
--- a/pkg/osutil/findproc_appengine.go
+++ b/pkg/osutil/findproc_appengine.go
@@ -1,4 +1,4 @@
-// +build !appengine
+// +build appengine
 
 /*
 Copyright 2013 The Camlistore Authors.