diff --git a/src/java/com/samskivert/util/Invoker.java b/src/java/com/samskivert/util/Invoker.java
index aee0e287..4f9cd9fa 100644
--- a/src/java/com/samskivert/util/Invoker.java
+++ b/src/java/com/samskivert/util/Invoker.java
@@ -22,6 +22,8 @@ package com.samskivert.util;
 
 import java.util.HashMap;
 
+import java.util.concurrent.Executor;
+
 import static com.samskivert.Log.log;
 
 /**
@@ -40,7 +42,7 @@ import static com.samskivert.Log.log;
  * is desirable.
  */
 public class Invoker extends LoopingThread
-    implements RunQueue
+    implements Executor, RunQueue
 {
     /**
      * The unit encapsulates a unit of executable code that will be run on the invoker thread. It
@@ -164,6 +166,12 @@ public class Invoker extends LoopingThread
         return _queue.size();
     }
 
+    // from Executor
+    public void execute (Runnable command)
+    {
+        postRunnable(command);
+    }
+
     // from RunQueue
     public void postRunnable (final Runnable r)
     {