diff --git a/portlist/portlist_ios.go b/portlist/portlist_ios.go
new file mode 100644
index 000000000..a7a85a54c
--- /dev/null
+++ b/portlist/portlist_ios.go
@@ -0,0 +1,22 @@
+// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin,!amd64
+
+package portlist
+
+import (
+	"errors"
+	"time"
+)
+
+const pollInterval = 9999 * time.Hour
+
+func listPorts() (List, error) {
+	return nil, errors.New("not implemented")
+}
+
+func addProcesses(pl []Port) ([]Port, error) {
+	return nil, errors.New("not implemented")
+}
diff --git a/portlist/portlist_darwin.go b/portlist/portlist_macos.go
similarity index 98%
rename from portlist/portlist_darwin.go
rename to portlist/portlist_macos.go
index 08bb514cc..12022cd32 100644
--- a/portlist/portlist_darwin.go
+++ b/portlist/portlist_macos.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !linux,!windows
+// +build darwin,amd64
 
 package portlist