Index: wp-includes/theme.php
===================================================================
--- wp-includes/theme.php	(revision 18318)
+++ wp-includes/theme.php	(working copy)
@@ -399,9 +399,10 @@
 		// The Twenty Ten, Default and Classic themes always trump their pretenders.
 		if ( isset($wp_themes[$name]) ) {
 			$trump_cards = array(
-				'classic'   => 'WordPress Classic',
-				'default'   => 'WordPress Default',
-				'twentyten' => 'Twenty Ten',
+				'classic'      => 'WordPress Classic',
+				'default'      => 'WordPress Default',
+				'twentyten'    => 'Twenty Ten',
+				'twentyeleven' => 'Twenty Eleven',
 			);
 			if ( isset( $trump_cards[ $stylesheet ] ) && $name == $trump_cards[ $stylesheet ] ) {
 				// If another theme has claimed to be one of our default themes, move