diff --git a/terminal_test.go b/terminal_test.go
index 901c72a..a27cdd6 100644
--- a/terminal_test.go
+++ b/terminal_test.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build darwin dragonfly freebsd linux,!appengine netbsd openbsd windows plan9 solaris
+
 package terminal
 
 import (