diff --git a/mailpoet/lib/API/MP/v1/Segments.php b/mailpoet/lib/API/MP/v1/Segments.php
index a2b02a734d..c5f16bc715 100644
--- a/mailpoet/lib/API/MP/v1/Segments.php
+++ b/mailpoet/lib/API/MP/v1/Segments.php
@@ -66,7 +66,7 @@ class Segments {
         $data['description'] ?? '',
         SegmentEntity::TYPE_DEFAULT,
         [],
-        $data['id']
+        (int)$data['id']
       );
     } catch (\Exception $e) {
       throw new APIException(
diff --git a/mailpoet/tests/integration/API/MP/SegmentsTest.php b/mailpoet/tests/integration/API/MP/SegmentsTest.php
index 2def747beb..0d715761a3 100644
--- a/mailpoet/tests/integration/API/MP/SegmentsTest.php
+++ b/mailpoet/tests/integration/API/MP/SegmentsTest.php
@@ -17,7 +17,6 @@ use MailPoet\Segments\SegmentsRepository;
 use MailPoet\Subscribers\SubscriberSegmentRepository;
 use MailPoet\Test\DataFactories\Form;
 use MailPoet\Test\DataFactories\Newsletter;
-use MailPoet\Test\DataFactories\NewsletterOption;
 use MailPoet\Test\DataFactories\Segment as SegmentFactory;
 use MailPoet\Test\DataFactories\Subscriber;
 
@@ -159,7 +158,7 @@ class SegmentsTest extends \MailPoetTest {
     );
 
     $data = [
-      'id' => $segment->getId(),
+      'id' => (string)$segment->getId(),
       'name' => 'new name',
       'description' => 'updated description',
     ];