diff --git a/_demo/go/gobuild/demo.go b/_demo/go/gobuild/demo.go
index e3c253f3..07626212 100644
--- a/_demo/go/gobuild/demo.go
+++ b/_demo/go/gobuild/demo.go
@@ -1,3 +1,5 @@
+//go:build go1.23
+
 package main
 
 import (