diff --git a/src/java/com/threerings/presents/dobj/DEvent.java b/src/java/com/threerings/presents/dobj/DEvent.java
index 29b757673..abffa797c 100644
--- a/src/java/com/threerings/presents/dobj/DEvent.java
+++ b/src/java/com/threerings/presents/dobj/DEvent.java
@@ -152,6 +152,23 @@ public abstract class DEvent implements Streamable
         return _transport;
     }
 
+    /**
+     * Notes the actual transport with which the event was transmitted.
+     */
+    public void noteActualTransport (Transport transport)
+    {
+        _actualTransport = transport;
+    }
+
+    /**
+     * Returns the actual transport with which the event was transmitted, or <code>null</code> if
+     * not yet known.
+     */
+    public Transport getActualTransport ()
+    {
+        return _actualTransport;
+    }
+
     /**
      * Events with associated listener interfaces should implement this function and notify the
      * supplied listener if it implements their event listening interface. For example, the {@link
@@ -195,6 +212,9 @@ public abstract class DEvent implements Streamable
     /** The transport parameters. */
     protected transient Transport _transport = Transport.DEFAULT;
 
+    /** The actual transport with which the event was transmitted (null if as yet unknown). */
+    protected transient Transport _actualTransport;
+
     /** Used to differentiate between null meaning we haven't initialized our old value and null
      * being the actual old value. */
     protected static final Object UNSET_OLD_VALUE = new Object();
diff --git a/src/java/com/threerings/presents/net/EventNotification.java b/src/java/com/threerings/presents/net/EventNotification.java
index ac025b2c3..5435a99af 100644
--- a/src/java/com/threerings/presents/net/EventNotification.java
+++ b/src/java/com/threerings/presents/net/EventNotification.java
@@ -62,6 +62,12 @@ public class EventNotification extends DownstreamMessage
         return _event.getTransport();
     }
 
+    @Override // documentation inherited
+    public void noteActualTransport (Transport transport)
+    {
+        _event.noteActualTransport(transport);
+    }
+
     @Override
     public String toString ()
     {
diff --git a/src/java/com/threerings/presents/net/Message.java b/src/java/com/threerings/presents/net/Message.java
index 98d5eb985..9ea16189b 100644
--- a/src/java/com/threerings/presents/net/Message.java
+++ b/src/java/com/threerings/presents/net/Message.java
@@ -50,4 +50,14 @@ public abstract class Message extends SimpleStreamableObject
     {
         return Transport.DEFAULT;
     }
+
+    /**
+     * For messages sent over the network, this notes the actual type of transport used to deliver
+     * the message.  This may not be the same as the hinted transport for various reasons (message
+     * too large to send as datagram, no datagram connection established, etc.)
+     */
+    public void noteActualTransport (Transport transport)
+    {
+        // no-op by default
+    }
 }
diff --git a/src/java/com/threerings/presents/server/net/ConnectionManager.java b/src/java/com/threerings/presents/server/net/ConnectionManager.java
index 8e45c32f5..6704ca395 100644
--- a/src/java/com/threerings/presents/server/net/ConnectionManager.java
+++ b/src/java/com/threerings/presents/server/net/ConnectionManager.java
@@ -62,6 +62,7 @@ import com.threerings.presents.client.Client;
 import com.threerings.presents.data.ConMgrStats;
 import com.threerings.presents.net.Message;
 import com.threerings.presents.net.PongResponse;
+import com.threerings.presents.net.Transport;
 import com.threerings.presents.server.Authenticator;
 import com.threerings.presents.server.ChainedAuthenticator;
 import com.threerings.presents.server.ClientManager;
@@ -923,6 +924,9 @@ public class ConnectionManager extends LoopingThread
                 return;
             }
 
+            // note the actual transport
+            msg.noteActualTransport(Transport.RELIABLE_ORDERED);
+
             _framer.resetFrame();
 
             // flatten this message using the connection's output stream
@@ -963,6 +967,9 @@ public class ConnectionManager extends LoopingThread
             return false;
         }
 
+        // note the actual transport
+        msg.noteActualTransport(Transport.UNRELIABLE_UNORDERED);
+
         // extract as a byte array
         byte[] data = _flattener.toByteArray();