diff --git a/terminal_test.go b/terminal_test.go
index d9b77c1..5e5d33b 100644
--- a/terminal_test.go
+++ b/terminal_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 darwin dragonfly freebsd linux,!appengine netbsd openbsd windows plan9 solaris
+// +build aix darwin dragonfly freebsd linux,!appengine netbsd openbsd windows plan9 solaris
 
 package terminal