@@ -426,7 +426,7 @@ private void postExecute() {
 					if (next != null) {
 						if (next.remainingDelay != 0) {
 							/* the delay may not have elapsed yet */
-							next.remainingDelay = Math.max(0L, targetTimeMillis - System.currentTimeMillis());
+							next.remainingDelay = Math.max(0L, next.targetTimeMillis - System.currentTimeMillis());
 						}
 						/* a task having the same serial was queued, execute it */
 						BackgroundExecutor.execute(next);
 
@@ -34,6 +34,9 @@
 @EActivity
 public class ThreadActivity extends Activity {
 
+	public static final long SERIAL_DELAY = 1000L;
+	public boolean calledDelayed = false;
+
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
@@ -151,4 +154,15 @@ void backgroundThrowException() {
 	void uiThreadThrowException() {
 		throw new RuntimeException();
 	}
+
+	@Background(serial = "foo")
+	protected void callDelayedSerial(Runnable callback) {
+		delayedSerial(System.currentTimeMillis(), callback);
+	}
+
+	@Background(serial = "foo", id = "delayedTask", delay = SERIAL_DELAY)
+	protected void delayedSerial(final long execTime, Runnable callback) {
+		calledDelayed = System.currentTimeMillis() - execTime >= SERIAL_DELAY;
+		callback.run();
+	}
 }
@@ -364,6 +364,22 @@ public void uncaughtException(Thread thread, Throwable ex) {
 		Assert.assertTrue("Exception should have been caught in the DefaultUncaughtExceptionHandler during @Background call.", propagatedExceptionToGlobalExceptionHandler);
 	}
 
+	@Test
+	public void testDelayedSerial() {
+		BackgroundExecutor.setExecutor(Executors.newScheduledThreadPool(1));
+
+		final Object LOCK = new Object();
+		activity.callDelayedSerial(new Runnable() {
+			@Override
+			public void run() {
+				LOCK.notify();
+			}
+		});
+		Assert.assertFalse(activity.calledDelayed);
+		waitOn(LOCK, ThreadActivity.SERIAL_DELAY * 2);
+		Assert.assertTrue(activity.calledDelayed);
+	}
+
 	/**
 	 * Call wait() on the given object with the specified timeout. Avoid
 	 * boilerplate code like synchronized or try..catch.
Original file line number	Diff line number	Diff line change
`@@ -426,7 +426,7 @@ private void postExecute() {`
`426`	`426`	`if (next != null) {`
`427`	`427`	`if (next.remainingDelay != 0) {`
`428`	`428`	`/* the delay may not have elapsed yet */`
`429`		`- next.remainingDelay = Math.max(0L, targetTimeMillis - System.currentTimeMillis());`
	`429`	`+ next.remainingDelay = Math.max(0L, next.targetTimeMillis - System.currentTimeMillis());`
`430`	`430`	`}`
`431`	`431`	`/* a task having the same serial was queued, execute it */`
`432`	`432`	`BackgroundExecutor.execute(next);`