diff --git a/src/github.com/matrix-org/dendrite/appservice/types/types.go b/src/github.com/matrix-org/dendrite/appservice/types/types.go
index a013e8b2..eac82c27 100644
--- a/src/github.com/matrix-org/dendrite/appservice/types/types.go
+++ b/src/github.com/matrix-org/dendrite/appservice/types/types.go
@@ -1,5 +1,3 @@
-// Copyright 2018 New Vector Ltd
-//
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -28,3 +26,8 @@ type ApplicationServiceWorkerState struct {
 	Cond        *sync.Cond
 	EventsReady bool
 }
+
+const (
+	// AppServiceDeviceID is the AS dummy device ID
+	AppServiceDeviceID = "AS_Device"
+)