diff --git a/util.go b/util.go
index 67b287c..daa36d7 100644
--- a/util.go
+++ b/util.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 linux
+// +build linux,!appengine
 
 // Package terminal provides support functions for dealing with terminals, as
 // commonly found on UNIX systems.