diff --git a/src/wp-admin/includes/class-wp-upgrader.php b/src/wp-admin/includes/class-wp-upgrader.php
index 89b51bb607..acab417d3b 100644
--- a/src/wp-admin/includes/class-wp-upgrader.php
+++ b/src/wp-admin/includes/class-wp-upgrader.php
@@ -685,6 +685,7 @@ class Plugin_Upgrader extends WP_Upgrader {
 		$this->strings['remove_old_failed'] = __('Could not remove the old plugin.');
 		$this->strings['process_failed'] = __('Plugin update failed.');
 		$this->strings['process_success'] = __('Plugin updated successfully.');
+		$this->strings['process_bulk_success'] = __('Plugins updated successfully.');
 	}
 
 	/**