diff --git a/term_unix_aix.go b/term_unix_aix.go
index 2d5efd2..e722809 100644
--- a/term_unix_aix.go
+++ b/term_unix_aix.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build aix
+// +build aix
+
 package term
 
 import "golang.org/x/sys/unix"
diff --git a/term_unix_zos.go b/term_unix_zos.go
index b85ab89..9ef1246 100644
--- a/term_unix_zos.go
+++ b/term_unix_zos.go
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build zos
+// +build zos
+
 package term
 
 import "golang.org/x/sys/unix"