diff --git wp-admin/includes/post.php wp-admin/includes/post.php
index 1483108..8b1b64c 100644
--- wp-admin/includes/post.php
+++ wp-admin/includes/post.php
@@ -1008,7 +1008,7 @@ function wp_edit_posts_query( $q = false ) {
 		$orderby = $q['orderby'];
 	} elseif ( isset( $q['post_status'] ) && in_array( $q['post_status'], array( 'pending', 'draft' ) ) ) {
 		$orderby = 'modified';
-	} elseif ( ! is_post_type_hierarchical( $post_type ) ) {
+	} elseif ( 'post' == $post_type ) {
 		$orderby = 'date';
 	}
 
@@ -1844,4 +1844,4 @@ function redirect_post($post_id = '') {
 	 */
 	wp_redirect( apply_filters( 'redirect_post_location', $location, $post_id ) );
 	exit;
-}
\ No newline at end of file
+}