diff --git a/core/module/page/page.php b/core/module/page/page.php
index dde9efb1..a18e92e9 100755
--- a/core/module/page/page.php
+++ b/core/module/page/page.php
@@ -93,7 +93,8 @@ class page extends common {
 			]);
 		}
 		// Jeton incorrect
-		elseif($_GET['csrf'] !== $_SESSION['csrf']) {
+		elseif(isset ($_GET['csrf']) AND
+			$_GET['csrf'] !== $_SESSION['csrf']) {
 			// Valeurs en sortie
 			$this->addOutput([
 				'redirect' => helper::baseUrl() . 'page/edit/' . $url[0],