diff --git a/src/main/java/com/github/johrstrom/listener/updater/AbstractUpdater.java b/src/main/java/com/github/johrstrom/listener/updater/AbstractUpdater.java
index 1db3af3..002e30a 100644
--- a/src/main/java/com/github/johrstrom/listener/updater/AbstractUpdater.java
+++ b/src/main/java/com/github/johrstrom/listener/updater/AbstractUpdater.java
@@ -77,13 +77,13 @@ protected String[] labelValues(SampleEvent event) {
 			String name = labels[i];
 			String value = null;
 			
-			// reserved keyword for the sampler's label (the name)
+			// reserved keywords for the sampler's label name.
 			if (name.equalsIgnoreCase("label")) {
 				value = event.getResult().getSampleLabel();
 			} else if (name.equalsIgnoreCase("code")) {
 				// code also reserved
 				value = event.getResult().getResponseCode();
-			} else if (name.equalsIgnoreCase("threadGroup")) {
+			} else if (name.equalsIgnoreCase("thread_group")) {
 				value = event.getThreadGroup();
 				
 			// try to find it as a plain'ol variable.
diff --git a/src/test/java/com/github/johrstrom/listener/updater/AbstractUpdaterTest.java b/src/test/java/com/github/johrstrom/listener/updater/AbstractUpdaterTest.java
index e46d76a..efc3172 100644
--- a/src/test/java/com/github/johrstrom/listener/updater/AbstractUpdaterTest.java
+++ b/src/test/java/com/github/johrstrom/listener/updater/AbstractUpdaterTest.java
@@ -29,7 +29,7 @@ public void update(SampleEvent e) {
 	@Test
 	public void testKeywords() {
 		BaseCollectorConfig base = TestUtilities.simpleCounterCfg();
-		base.setLabels(new String[] {"label","code"});
+		base.setLabels(new String[] {"label","code", "thread_group"});
 		ListenerCollectorConfig cfg = new ListenerCollectorConfig(base);
 		
 		TestUpdater u = new TestUpdater(cfg);
@@ -42,8 +42,8 @@ public void testKeywords() {
 		String[] labels = u.labelValues(event);
 		
 
-		Assert.assertTrue(labels.length == 2);
-		Assert.assertArrayEquals(new String[] {"test_label", "204"}, labels);
+		Assert.assertTrue(labels.length == 3);
+		Assert.assertArrayEquals(new String[] {"test_label", "204", "test_tg"}, labels);
 	}
 	
 	@Test