diff --git a/app/code/Magento/Webapi/Model/Rest/Swagger/Generator.php b/app/code/Magento/Webapi/Model/Rest/Swagger/Generator.php
index 4468a5af6cce1..1e3a9c64e927e 100644
--- a/app/code/Magento/Webapi/Model/Rest/Swagger/Generator.php
+++ b/app/code/Magento/Webapi/Model/Rest/Swagger/Generator.php
@@ -39,7 +39,7 @@ class Generator extends AbstractSchemaGenerator
     const UNAUTHORIZED_DESCRIPTION = '401 Unauthorized';
 
     /** Array signifier */
-    const ARRAY_SIGNIFIER = '[]';
+    const ARRAY_SIGNIFIER = '[0]';
 
     /**
      * Swagger factory instance.