diff --git a/data/lang/lang.go b/data/lang/lang.go
index dd224f72..d82793b6 100644
--- a/data/lang/lang.go
+++ b/data/lang/lang.go
@@ -1,3 +1,6 @@
+//go:build generate
+// +build generate
+
 package main
 
 import (
diff --git a/data/lang/lang_test.go b/data/lang/lang_test.go
index 7ff80455..dcd3015a 100644
--- a/data/lang/lang_test.go
+++ b/data/lang/lang_test.go
@@ -1,3 +1,6 @@
+//go:build generate
+// +build generate
+
 package main
 
 import (