diff --git a/net/portmapper/upnp.go b/net/portmapper/upnp.go
index cc7782736..a28d774b7 100644
--- a/net/portmapper/upnp.go
+++ b/net/portmapper/upnp.go
@@ -4,6 +4,7 @@
 
 //go:build !js
 // +build !js
+
 // (no raw sockets in JS/WASM)
 
 package portmapper