diff --git a/term_nosyscall6.go b/term_nosyscall6.go
index df92339..1c320fd 100644
--- a/term_nosyscall6.go
+++ b/term_nosyscall6.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 aix os400 solaris
+// +build aix os400 solaris zos
 
 package readline