diff --git a/opts/swarmopts/port.go b/opts/swarmopts/port.go
index 2a8c2b71c039..839d058f335e 100644
--- a/opts/swarmopts/port.go
+++ b/opts/swarmopts/port.go
@@ -1,3 +1,6 @@
+// FIXME(thaJeztah): remove once we are a module; the go:build directive prevents go from downgrading language version to go1.16:
+//go:build go1.24
+
 package swarmopts
 
 import (