diff --git a/classen/HTML.php b/classen/HTML.php
index 2564ba4..1f871a1 100644
--- a/classen/HTML.php
+++ b/classen/HTML.php
@@ -226,7 +226,7 @@
 			$this->FertigesHTML = str_replace("%%GET_IP%%", @$_SERVER["REMOTE_ADDR"], $this->FertigesHTML);
 
 			// Add CSRF token
-			$this->FertigesHTML = str_replace("%%CSRF%%", '<input type="hidden" name="csrf" value="'.$_SESSION['csrf'].'">', $this->FertigesHTML);
+			$this->FertigesHTML = str_replace("%%CSRF%%", '<input type="hidden" name="csrf" value="'.(isset($_SESSION['csrf']) ? $_SESSION['csrf'] : '').'">', $this->FertigesHTML);
 			
 			$this->isBuild = true;
 		}