diff --git a/internal/iana/gen.go b/internal/iana/gen.go
index d1b42bc..c808bde 100644
--- a/internal/iana/gen.go
+++ b/internal/iana/gen.go
@@ -46,7 +46,7 @@
 	fmt.Fprintf(&bb, "// go generate gen.go\n")
 	fmt.Fprintf(&bb, "// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT\n\n")
 	fmt.Fprintf(&bb, "// Package iana provides protocol number resources managed by the Internet Assigned Numbers Authority (IANA).\n")
-	fmt.Fprintf(&bb, `package iana // import "golang.org/x/net/internal/iana"\n\n`)
+	fmt.Fprintf(&bb, `package iana // import "golang.org/x/net/internal/iana"`+"\n\n")
 	for _, r := range registries {
 		resp, err := http.Get(r.url)
 		if err != nil {