diff --git a/src/wp-admin/includes/class-wp-plugin-install-list-table.php b/src/wp-admin/includes/class-wp-plugin-install-list-table.php
index 0b2de90613..52f4510fbb 100644
--- a/src/wp-admin/includes/class-wp-plugin-install-list-table.php
+++ b/src/wp-admin/includes/class-wp-plugin-install-list-table.php
@@ -85,7 +85,7 @@ class WP_Plugin_Install_List_Table extends WP_List_Table {
 	 * @global string $term
 	 */
 	public function prepare_items() {
-		include( ABSPATH . 'wp-admin/includes/plugin-install.php' );
+		include_once( ABSPATH . 'wp-admin/includes/plugin-install.php' );
 
 		global $tabs, $tab, $paged, $type, $term;