diff --git a/src/as/com/threerings/crowd/chat/client/ChatDirector.as b/src/as/com/threerings/crowd/chat/client/ChatDirector.as
index 294902279..b840d4aff 100644
--- a/src/as/com/threerings/crowd/chat/client/ChatDirector.as
+++ b/src/as/com/threerings/crowd/chat/client/ChatDirector.as
@@ -51,6 +51,7 @@ import com.threerings.crowd.data.PlaceObject;
 import com.threerings.crowd.util.CrowdContext;
 
 import com.threerings.crowd.chat.data.ChatCodes;
+import com.threerings.crowd.chat.data.ChatMarshaller;
 import com.threerings.crowd.chat.data.ChatMessage;
 import com.threerings.crowd.chat.data.SystemMessage;
 import com.threerings.crowd.chat.data.TellFeedbackMessage;
@@ -97,6 +98,9 @@ public class ChatDirector extends BasicDirector
         registerCommandHandler(msg, "think", new ThinkHandler());
 //        registerCommandHandler(msg, "tell", new TellHandler());
         registerCommandHandler(msg, "broadcast", new BroadcastHandler());
+
+        // ensure that the compiler includes these necessary symbols
+        var i :int = ChatMarshaller.AWAY;
     }
 
     /**
diff --git a/src/as/com/threerings/crowd/client/CrowdClient.as b/src/as/com/threerings/crowd/client/CrowdClient.as
new file mode 100644
index 000000000..1ab39b69e
--- /dev/null
+++ b/src/as/com/threerings/crowd/client/CrowdClient.as
@@ -0,0 +1,46 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2008 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.crowd.client {
+
+import com.threerings.presents.client.Client;
+import com.threerings.presents.net.Credentials;
+
+import com.threerings.crowd.data.BodyMarshaller;
+import com.threerings.crowd.data.CrowdPermissionPolicy;
+
+/**
+ * Users of the Crowd services should extend this client so that it can ensure that certain
+ * ActionScript classes that will arrive over the wire as a result of using basic Crowd services
+ * will be included in the client.
+ */
+public class CrowdClient extends Client
+{
+    public function CrowdClient (creds :Credentials)
+    {
+        super(creds);
+
+        // ensure that the compiler includes these necessary symbols
+        var i :int = BodyMarshaller.SET_IDLE;
+        var c :Class = CrowdPermissionPolicy;
+    }
+}
+}
diff --git a/src/as/com/threerings/crowd/client/LocationDirector.as b/src/as/com/threerings/crowd/client/LocationDirector.as
index b4a6e81db..813fecaf3 100644
--- a/src/as/com/threerings/crowd/client/LocationDirector.as
+++ b/src/as/com/threerings/crowd/client/LocationDirector.as
@@ -39,6 +39,7 @@ import com.threerings.presents.dobj.SubscriberAdapter;
 import com.threerings.crowd.data.BodyObject;
 import com.threerings.crowd.data.CrowdCodes;
 import com.threerings.crowd.data.LocationCodes;
+import com.threerings.crowd.data.LocationMarshaller;
 import com.threerings.crowd.data.PlaceConfig;
 import com.threerings.crowd.data.PlaceObject;
 import com.threerings.crowd.util.CrowdContext;
@@ -66,8 +67,10 @@ public class LocationDirector extends BasicDirector
         _cctx = ctx;
 
         // register for location notifications
-        _cctx.getClient().getInvocationDirector().registerReceiver(
-            new LocationDecoder(this));
+        _cctx.getClient().getInvocationDirector().registerReceiver(new LocationDecoder(this));
+
+        // ensure that the compiler includes these necessary symbols
+        var i :int = LocationMarshaller.LEAVE_PLACE;
     }
 
     /**
diff --git a/src/as/com/threerings/presents/client/Client.as b/src/as/com/threerings/presents/client/Client.as
index 95a237beb..9a71cfa24 100644
--- a/src/as/com/threerings/presents/client/Client.as
+++ b/src/as/com/threerings/presents/client/Client.as
@@ -32,6 +32,7 @@ import com.threerings.util.MethodQueue;
 import com.threerings.presents.client.InvocationService_ConfirmListener;
 import com.threerings.presents.data.ClientObject;
 import com.threerings.presents.data.InvocationCodes;
+import com.threerings.presents.data.TimeBaseMarshaller;
 
 import com.threerings.presents.dobj.DObjectManager;
 
@@ -51,6 +52,9 @@ public class Client extends EventDispatcher
     public function Client (creds :Credentials)
     {
         _creds = creds;
+
+        // ensure that the compiler includes these necessary symbols
+        var i :int = TimeBaseMarshaller.GET_TIME_OID;
     }
 
     /**