diff --git a/Serializer/Normalizer/PhoneNumberNormalizer.php b/Serializer/Normalizer/PhoneNumberNormalizer.php
index f73b38b4..d3040bf9 100644
--- a/Serializer/Normalizer/PhoneNumberNormalizer.php
+++ b/Serializer/Normalizer/PhoneNumberNormalizer.php
@@ -85,6 +85,9 @@ public function supportsNormalization($data, $format = null)
      */
     public function denormalize($data, $class, $format = null, array $context = array())
     {
+        if ($data === null) {
+            return;
+        }
         try {
             return $this->phoneNumberUtil->parse($data, $this->region);
         } catch (NumberParseException $e) {
@@ -99,4 +102,4 @@ public function supportsDenormalization($data, $type, $format = null)
     {
         return $type === 'libphonenumber\PhoneNumber';
     }
-}
\ No newline at end of file
+}