diff --git a/guide/cpu-max-stack-depth.go b/guide/cpu-max-stack-depth.go
index 721ea35..23d8e25 100644
--- a/guide/cpu-max-stack-depth.go
+++ b/guide/cpu-max-stack-depth.go
@@ -1,3 +1,4 @@
+//go:build ignore
 // +build ignore
 
 package main