diff --git a/src/Component/Serializer/Parser/JMSCore/Type/Parser.php b/src/Component/Serializer/Parser/JMSCore/Type/Parser.php
index 4ad29f137..700530c96 100644
--- a/src/Component/Serializer/Parser/JMSCore/Type/Parser.php
+++ b/src/Component/Serializer/Parser/JMSCore/Type/Parser.php
@@ -77,10 +77,18 @@ private function visit(bool $fetchingParam = false)
             $this->lexer->moveNext();
 
             while (true) {
-                if (is_array($this->lexer->token)) {
-                    $this->token = Token::fromArray($this->lexer->token);
+                // Doctrine Lexer 1.x uses arrays; newer versions use token objects.
+                /** @var array<string, int|string>|object|null $token */
+                $token = $this->lexer->token;
+
+                if (null === $token) {
+                    throw new SyntaxError('Syntax error, unexpected end of stream');
+                }
+
+                if (is_array($token)) {
+                    $this->token = Token::fromArray($token);
                 } else {
-                    $this->token = Token::fromObject($this->lexer->token);
+                    $this->token = Token::fromObject($token);
                 }
 
                 if ("" === $this->token->value) {
diff --git a/src/Model/Entity/Loyalty/Loyalty.php b/src/Model/Entity/Loyalty/Loyalty.php
index 08f7ddbfe..b81d0c67b 100644
--- a/src/Model/Entity/Loyalty/Loyalty.php
+++ b/src/Model/Entity/Loyalty/Loyalty.php
@@ -110,6 +110,14 @@ class Loyalty
      */
     public $confirmSmsRegistration;
 
+    /**
+     * @var bool
+     *
+     * @JMS\Type("bool")
+     * @JMS\SerializedName("promoChargeAllowed")
+     */
+    public $promoChargeAllowed;
+
     /**
      * @var int
      *