diff --git a/command_notwin.go b/command_notwin.go
index 6159c1cc..bb5dad90 100644
--- a/command_notwin.go
+++ b/command_notwin.go
@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package cobra
diff --git a/command_win.go b/command_win.go
index 8768b173..a84f5a82 100644
--- a/command_win.go
+++ b/command_win.go
@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package cobra