Index: wp-includes/update.php
===================================================================
--- wp-includes/update.php	(revision 21203)
+++ wp-includes/update.php	(working copy)
@@ -352,6 +352,7 @@
 	}
 
 	$counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'];
+    $counts = apply_filters( 'update_count', $counts );
 	$update_title = array();
 	if ( $counts['wordpress'] )
 		$update_title[] = sprintf(__('%d WordPress Update'), $counts['wordpress']);