diff --git a/internal/isatty/isatty_tcgets.go b/internal/isatty/isatty_tcgets.go
index eb6e9ac5e7..67787657fb 100644
--- a/internal/isatty/isatty_tcgets.go
+++ b/internal/isatty/isatty_tcgets.go
@@ -1,5 +1,5 @@
-//go:build (linux || aix) && !appengine
-// +build linux aix
+//go:build (linux || aix || zos) && !appengine
+// +build linux aix zos
 // +build !appengine
 
 package isatty