Ticket #12601: 12601.diff

canonical.php

@@ -369 +369 @@
                 $where .= $wpdb->prepare(" AND MONTH(post_date) = %d", get_query_var('monthnum'));
         if ( get_query_var('day') )
                 $where .= $wpdb->prepare(" AND DAYOFMONTH(post_date) = %d", get_query_var('day'));
+        if ( get_query_var('post_type') )
+                $where .= $wpdb->prepare(" AND post_type = %s", get_query_var('post_type'));
 
         $post_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE $where AND post_status = 'publish'");
         if ( !$post_id )