diff --git a/packetio/hardlimit.go b/packetio/hardlimit.go
index b902ef9..9f4fc5e 100644
--- a/packetio/hardlimit.go
+++ b/packetio/hardlimit.go
@@ -1,3 +1,4 @@
+//go:build packetioSizeHardlimit
 // +build packetioSizeHardlimit
 
 package packetio