diff --git a/lib/SimpleSAML/Store.php b/lib/SimpleSAML/Store.php
index c2c4fceddad748f53535e609cbf50cc59d0c367b..869f9a6bf7be5526a6cc35b0128075f824ae3a96 100644
--- a/lib/SimpleSAML/Store.php
+++ b/lib/SimpleSAML/Store.php
@@ -64,9 +64,11 @@ abstract class Store implements Utils\ClearableState
                         $c
                     );
                 }
+                /** @var \SimpleSAML\Store|false */
                 self::$instance = new $className();
         }
 
+        /** @var \SimpleSAML\Store|false */
         return self::$instance;
     }