diff --git a/class/actions_dolimeet.class.php b/class/actions_dolimeet.class.php
index f248163..c1ec9d8 100644
--- a/class/actions_dolimeet.class.php
+++ b/class/actions_dolimeet.class.php
@@ -47,9 +47,9 @@ class ActionsDolimeet
     public array $results = [];
 
     /**
-     * @var string String displayed by executeHook() immediately after return.
+     * @var string|null String displayed by executeHook() immediately after return.
      */
-    public string $resprints;
+    public ?string $resprints;
 
     /**
      * Constructor
diff --git a/class/session.class.php b/class/session.class.php
index f17cc7c..545be4a 100644
--- a/class/session.class.php
+++ b/class/session.class.php
@@ -55,7 +55,7 @@ class Session extends SaturneObject
     /**
      * @var int Does object support extrafields ? 0 = No, 1 = Yes.
      */
-    public int $isextrafieldmanaged = 1;
+    public $isextrafieldmanaged = 1;
 
     /**
      * @var string Name of icon for session. Must be a 'fa-xxx' fontawesome code (or 'fa-xxx_fa_color_size') or 'session@dolimeet' if picto is file 'img/object_session.png'.