diff --git a/src/wp-admin/includes/class-wp-list-table.php b/src/wp-admin/includes/class-wp-list-table.php
index 8ccd02998f..2ef5f8d1b9 100644
--- a/src/wp-admin/includes/class-wp-list-table.php
+++ b/src/wp-admin/includes/class-wp-list-table.php
@@ -1073,7 +1073,7 @@ class WP_List_Table {
 		// If the primary column doesn't exist,
 		// fall back to the first non-checkbox column.
 		if ( ! isset( $columns[ $default ] ) ) {
-			$default = WP_List_Table::get_default_primary_column_name();
+			$default = self::get_default_primary_column_name();
 		}
 
 		/**
diff --git a/src/wp-admin/includes/class-wp-screen.php b/src/wp-admin/includes/class-wp-screen.php
index 57077ed299..9464fabe05 100644
--- a/src/wp-admin/includes/class-wp-screen.php
+++ b/src/wp-admin/includes/class-wp-screen.php
@@ -377,7 +377,7 @@ final class WP_Screen {
 				return $screen;
 			}
 		} else {
-			$screen     = new WP_Screen();
+			$screen     = new self();
 			$screen->id = $id;
 		}