Index: wp-includes/query.php
===================================================================
--- wp-includes/query.php	(revision 17632)
+++ wp-includes/query.php	(working copy)
@@ -1365,6 +1365,7 @@
 			, 'comments_popup'
 			, 'meta_key'
 			, 'meta_value'
+			, 'meta_query'
 			, 'preview'
 			, 's'
 			, 'sentence'