diff --git a/src/main/java/com/threerings/presents/dobj/DSet.java b/src/main/java/com/threerings/presents/dobj/DSet.java
index 82d5c49b7..53c5176c7 100644
--- a/src/main/java/com/threerings/presents/dobj/DSet.java
+++ b/src/main/java/com/threerings/presents/dobj/DSet.java
@@ -152,6 +152,14 @@ public class DSet<E extends DSet.Entry>
     {
     }
 
+    /**
+     * Returns <tt>true</tt> if this set contains no entries.
+     */
+    public boolean isEmpty ()
+    {
+        return _size == 0;
+    }
+
     /**
      * Returns the number of entries in this set.
      */