diff --git a/module/VuFind/src/VuFind/Session/File.php b/module/VuFind/src/VuFind/Session/File.php
index f8eb60cf64c75040de9e5ec5e9b7c43bca8da61d..eaccf012e53078a342d550691a011abbc2548208 100644
--- a/module/VuFind/src/VuFind/Session/File.php
+++ b/module/VuFind/src/VuFind/Session/File.php
@@ -38,6 +38,11 @@ namespace VuFind\Session;
  */
 class File extends AbstractBase
 {
+    /**
+     * Path to session file (boolean false until set)
+     *
+     * @var string|bool
+     */
     protected $path = false;
 
     /**