diff --git a/lib/API/JSON/v1/DynamicSegments.php b/lib/API/JSON/v1/DynamicSegments.php
index 809b306d89..c8bbac99c6 100644
--- a/lib/API/JSON/v1/DynamicSegments.php
+++ b/lib/API/JSON/v1/DynamicSegments.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types = 1);
 
 namespace MailPoet\API\JSON\v1;
 
@@ -143,6 +143,8 @@ class DynamicSegments extends APIEndpoint {
         return WPFunctions::get()->__('Please select a type for the comparison, a number of orders and a number of days.', 'mailpoet');
       case InvalidFilterException::MISSING_TOTAL_SPENT_FIELDS:
         return WPFunctions::get()->__('Please select a type for the comparison, an amount and a number of days.', 'mailpoet');
+      case InvalidFilterException::MISSING_FILTER:
+        return WPFunctions::get()->__('Please add at least one condition for filtering.', 'mailpoet');
       default:
         return WPFunctions::get()->__('An error occurred while saving data.', 'mailpoet');
     }
diff --git a/tests/integration/API/JSON/v1/DynamicSegmentsTest.php b/tests/integration/API/JSON/v1/DynamicSegmentsTest.php
index 4c370cffb3..cff150ca28 100644
--- a/tests/integration/API/JSON/v1/DynamicSegmentsTest.php
+++ b/tests/integration/API/JSON/v1/DynamicSegmentsTest.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types = 1);
 
 namespace MailPoet\API\JSON\v1;
 
@@ -9,6 +9,7 @@ use MailPoet\Entities\DynamicSegmentFilterEntity;
 use MailPoet\Entities\NewsletterEntity;
 use MailPoet\Entities\NewsletterSegmentEntity;
 use MailPoet\Entities\SegmentEntity;
+use MailPoet\Segments\DynamicSegments\Filters\UserRole;
 
 class DynamicSegmentsTest extends \MailPoetTest {
 
@@ -42,8 +43,11 @@ class DynamicSegmentsTest extends \MailPoetTest {
     $response = $this->endpoint->save([
       'name' => 'Test dynamic',
       'description' => 'description dynamic',
-      'segmentType' => DynamicSegmentFilterData::TYPE_USER_ROLE,
-      'wordpressRole' => 'editor',
+      'filters' => [[
+        'segmentType' => DynamicSegmentFilterData::TYPE_USER_ROLE,
+        'wordpressRole' => 'editor',
+        'action' => UserRole::TYPE,
+      ]],
     ]);
     expect($response)->isInstanceOf('\MailPoet\API\JSON\SuccessResponse');
     expect($response->status)->equals(self::SUCCESS_RESPONSE_CODE);
@@ -56,7 +60,7 @@ class DynamicSegmentsTest extends \MailPoetTest {
     ]);
     expect($response)->isInstanceOf('\MailPoet\API\JSON\ErrorResponse');
     expect($response->status)->equals(self::INVALID_DATA_RESPONSE_CODE);
-    expect($response->errors[0]['message'])->equals('The segment type is missing.');
+    expect($response->errors[0]['message'])->equals('Please add at least one condition for filtering.');
   }
 
   public function testSaverReturnsErrorOnDuplicateRecord() {