diff --git a/src/java/com/threerings/util/StreamableArrayIntSet.java b/src/java/com/threerings/util/StreamableArrayIntSet.java
new file mode 100644
index 000000000..1d64cbd69
--- /dev/null
+++ b/src/java/com/threerings/util/StreamableArrayIntSet.java
@@ -0,0 +1,66 @@
+//
+// $Id: StreamableArrayIntSet.java,v 1.1 2004/01/17 01:14:12 eric Exp $
+
+package com.threerings.util;
+
+import java.io.IOException;
+import java.util.Iterator;
+
+import com.samskivert.util.ArrayIntSet;
+
+import com.threerings.io.ObjectInputStream;
+import com.threerings.io.ObjectOutputStream;
+import com.threerings.io.Streamable;
+
+/**
+ * A {@link ArrayIntSet} extension that can be streamed.
+ */
+public class StreamableArrayIntSet extends ArrayIntSet
+    implements Streamable
+{
+
+    // documentation inherited
+    public StreamableArrayIntSet (int[] values)
+    {
+        super(values);
+    }
+
+    // documentation inherited
+    public StreamableArrayIntSet (int initialCapacity)
+    {
+        super(initialCapacity);
+    }
+
+    // documentation inherited
+    public StreamableArrayIntSet ()
+    {
+        super();
+    }
+
+    /**
+     * Writes our custom streamable fields.
+     */
+    public void writeObject (ObjectOutputStream out)
+        throws IOException
+    {
+        int size = size();
+        out.writeInt(size);
+        Iterator itr = iterator();
+        while (itr.hasNext()) {
+            int value = ((Integer)itr.next()).intValue();
+            out.writeInt(value);
+        }
+    }
+
+    /**
+     * Reads our custom streamable fields.
+     */
+    public void readObject (ObjectInputStream in)
+        throws IOException, ClassNotFoundException
+    {
+        int size = in.readInt();
+        for (int ii = 0; ii < size; ii++) {
+            add(in.readInt());
+        }
+    }
+}