diff --git a/plugin/plugin.go b/plugin/plugin.go
index 70876c04..48ba067f 100644
--- a/plugin/plugin.go
+++ b/plugin/plugin.go
@@ -20,7 +20,7 @@ import (
 
 var Log = common.Log
 
-func Start(weaveAPIAddr string, dockerAPIAddr string, address string, meshAddress string, noMulticastRoute bool) {
+func Start(weaveAPIAddr string, dockerAPIAddr string, address string, meshAddress string) {
 	weave := weaveapi.NewClient(weaveAPIAddr, Log)
 
 	var dockerClient *docker.Client
@@ -33,9 +33,6 @@ func Start(weaveAPIAddr string, dockerAPIAddr string, address string, meshAddres
 		}
 	}
 
-	if noMulticastRoute {
-		Log.Warning("--no-multicast-route option has been removed; multicast is off by default")
-	}
 	if dockerClient == nil {
 		Log.Info("Running without Docker API connection")
 	} else {
diff --git a/prog/weaver/main.go b/prog/weaver/main.go
index d1b1515b..ba38d666 100644
--- a/prog/weaver/main.go
+++ b/prog/weaver/main.go
@@ -153,7 +153,6 @@ func main() {
 		advertiseAddress   string
 		pluginSocket       string
 		pluginMeshSocket   string
-		noMulticastRoute   bool
 		enablePlugin       bool
 
 		defaultDockerHost = "unix:///var/run/docker.sock"
@@ -203,7 +202,6 @@ func main() {
 	mflag.BoolVar(&enablePlugin, []string{"-plugin"}, false, "enable Docker plugin")
 	mflag.StringVar(&pluginSocket, []string{"-plugin-socket"}, "/run/docker/plugins/weave.sock", "plugin socket on which to listen")
 	mflag.StringVar(&pluginMeshSocket, []string{"-plugin-mesh-socket"}, "/run/docker/plugins/weavemesh.sock", "plugin socket on which to listen in mesh mode")
-	mflag.BoolVar(&noMulticastRoute, []string{"-no-multicast-route"}, false, "deprecated (this is now the default)")
 
 	// crude way of detecting that we probably have been started in a
 	// container, with `weave launch` --> suppress misleading paths in
@@ -407,8 +405,7 @@ func main() {
 	}
 
 	if enablePlugin {
-		// TODO(mp) do not pass pluginMeshSocket if plugin-v2 is in use
-		go plugin.Start(httpAddr, dockerAPI, pluginSocket, pluginMeshSocket, noMulticastRoute)
+		go plugin.Start(httpAddr, dockerAPI, pluginSocket, pluginMeshSocket)
 	}
 
 	signals.SignalHandlerLoop(common.Log, router)
diff --git a/weave b/weave
index 0553197d..56992ff8 100755
--- a/weave
+++ b/weave
@@ -49,7 +49,7 @@ weave launch        <same arguments as 'weave launch-router'>
                       [--no-restart] [--resume] [--no-discovery] [--no-dns]
                       [--ipalloc-init <mode>]
                       [--ipalloc-range <cidr> [--ipalloc-default-subnet <cidr>]]
-                      [--plugin [--no-multicast-route]]
+                      [--plugin]
                       [--log-level=debug|info|warning|error]
                       <peer> ...
       launch-proxy  [-H <endpoint>] [--without-dns] [--no-multicast-route]