diff --git a/lib/compat/wordpress-6.8/class-gutenberg-rest-user-controller.php b/lib/compat/wordpress-6.8/class-gutenberg-rest-user-controller.php
index 3dbc966aae9edb..b1c333338c61e9 100644
--- a/lib/compat/wordpress-6.8/class-gutenberg-rest-user-controller.php
+++ b/lib/compat/wordpress-6.8/class-gutenberg-rest-user-controller.php
@@ -45,7 +45,7 @@ function gutenberg_modify_user_query_args( $prepared_args, $request ) {
 			'name'     => 'display_name',
 		);
 		$search_columns         = array_map(
-			function ( $column ) use ( $search_columns_mapping ) {
+			static function ( $column ) use ( $search_columns_mapping ) {
 				return isset( $search_columns_mapping[ $column ] )
 					? $search_columns_mapping[ $column ]
 					: $column;