diff --git a/class-simple-page-ordering.php b/class-simple-page-ordering.php
index 81dcc9a..8098e2d 100644
--- a/class-simple-page-ordering.php
+++ b/class-simple-page-ordering.php
@@ -435,14 +435,10 @@ public static function page_row_actions( $actions, $post ) {
 
 			// Get the relevant siblings.
 			if ( 0 === $post->post_parent ) {
-                $siblings = $top_level_pages;
-            } else {
-                if (isset($children_pages[$post->post_parent])) {
-                    $siblings = $children_pages[$post->post_parent];
-                } else {
-                    $siblings = [];
-                }
-            }
+				$siblings = $top_level_pages;
+			} else {
+				$siblings = $children_pages[ $post->post_parent ] ?? [];
+			}
 
 			// Assume no sibling.
 			$sibling = 0;