diff --git includes/ajax.inc includes/ajax.inc
index 5c9f708..730faed 100644
--- includes/ajax.inc
+++ includes/ajax.inc
@@ -720,7 +720,7 @@ function ajax_command_changed($selector, $asterisk = '') {
   return array(
     'command' => 'changed',
     'selector' => $selector,
-    'star' => $asterisk,
+    'asterisk' => $asterisk,
   );
 }
 
diff --git modules/simpletest/tests/ajax.test modules/simpletest/tests/ajax.test
index a4f1a9c..fbc9597 100644
--- modules/simpletest/tests/ajax.test
+++ modules/simpletest/tests/ajax.test
@@ -107,6 +107,11 @@ class AJAXCommandsTestCase extends AJAXTestCase {
     $command = $commands[1];
     $this->assertTrue($command['command'] == 'changed' && $command['selector'] == '#changed_div', "'changed' AJAX command issued with correct selector");
 
+    // Tests the 'changed' command using the second argument.
+    $commands = $this->drupalPostAJAX($form_path, $edit, 'changed_command_asterisk_example');
+    $command = $commands[1];
+    $this->assertTrue($command['command'] == 'changed' && $command['selector'] == '#changed_div' && $command['asterisk'] == '#changed_div_mark_this', "'changed' AJAX command (with asterisk) issued with correct selector");
+
     // 'css' command will go here when it is implemented.
 
     // Tests the 'data' command.
diff --git modules/simpletest/tests/ajax_forms_test.module modules/simpletest/tests/ajax_forms_test.module
index 7143dff..219e13d 100644
--- modules/simpletest/tests/ajax_forms_test.module
+++ modules/simpletest/tests/ajax_forms_test.module
@@ -130,7 +130,7 @@ function ajax_forms_test_ajax_commands_form($form, &$form_state) {
     '#suffix' => '<div id="before_div">Insert something before this.</div>',
   );
 
-  // Shows the 'changed' command.
+  // Shows the 'changed' command without asterisk.
   $form['changed_command_example'] = array(
     '#value' => t("AJAX changed: Click to mark div changed."),
     '#type' => 'submit',
@@ -139,6 +139,14 @@ function ajax_forms_test_ajax_commands_form($form, &$form_state) {
     ),
     '#suffix' => '<div id="changed_div"> <div id="changed_div_mark_this">This div can be marked as changed or not.</div></div>',
   );
+  // Shows the 'changed' command adding the asterisk.
+  $form['changed_command_asterisk_example'] = array(
+    '#value' => t("AJAX changed: Click to mark div changed with asterisk."),
+    '#type' => 'submit',
+    '#ajax' => array(
+      'callback' => 'ajax_forms_test_advanced_commands_changed_asterisk_callback',
+    ),
+  );
 
   // Shows the AJAX 'css' command.
   // @todo Note that this won't work until http://drupal.org/node/623320 lands.
@@ -264,14 +272,15 @@ function ajax_forms_test_advanced_commands_before_callback($form, $form_state) {
  * AJAX callback for 'changed'.
  */
 function ajax_forms_test_advanced_commands_changed_callback($form, $form_state) {
-  $checkbox_value = $form_state['values']['changed_command_example'];
-  $checkbox_value_string = $checkbox_value ? "TRUE" : "FALSE";
+  $commands[] = ajax_command_changed( '#changed_div');
+  return array('#type' => 'ajax_commands', '#ajax_commands' => $commands);
+}
+/**
+ * AJAX callback for 'changed' with asterisk marking inner div.
+ */
+function ajax_forms_test_advanced_commands_changed_asterisk_callback($form, $form_state) {
   $commands = array();
-  if ($checkbox_value) {
-    // @todo This does not yet exercise the 2nd arg (asterisk) so that should
-    //       be added when it works.
-    $commands[] = ajax_command_changed( '#changed_div');
-  }
+  $commands[] = ajax_command_changed( '#changed_div', '#changed_div_mark_this');
   return array('#type' => 'ajax_commands', '#ajax_commands' => $commands);
 }