diff --git a/mailpoet/lib/Features/FeaturesController.php b/mailpoet/lib/Features/FeaturesController.php
index 0574f2c5a4..a64d30fd4f 100644
--- a/mailpoet/lib/Features/FeaturesController.php
+++ b/mailpoet/lib/Features/FeaturesController.php
@@ -7,12 +7,14 @@ use MailPoetVendor\Doctrine\DBAL\Exception\TableNotFoundException;
 class FeaturesController {
   const LANDINGPAGE_AB_TEST_DEBUGGER = 'landingpage_ab_test_debugger';
   const FEATURE_BRAND_TEMPLATES = 'brand_templates';
+  const GUTENBERG_EMAIL_EDITOR = 'gutenberg_email_editor';
 
   // Define feature defaults in the array below in the following form:
   //   self::FEATURE_NAME_OF_FEATURE => true,
   private $defaults = [
     self::LANDINGPAGE_AB_TEST_DEBUGGER => false,
     self::FEATURE_BRAND_TEMPLATES => false,
+    self::GUTENBERG_EMAIL_EDITOR => false,
   ];
 
   /** @var array|null */