diff --git a/src/java/com/samskivert/util/tests/SerialExecutorTest.java b/src/java/com/samskivert/util/tests/SerialExecutorTest.java
index 0085caab..1c2815f2 100644
--- a/src/java/com/samskivert/util/tests/SerialExecutorTest.java
+++ b/src/java/com/samskivert/util/tests/SerialExecutorTest.java
@@ -20,6 +20,8 @@
 
 package com.samskivert.util.tests;
 
+import java.util.concurrent.Executor;
+
 import junit.framework.Test;
 import junit.framework.TestCase;