diff --git a/app/code/Magento/CatalogGraphQl/Model/Resolver/Category.php b/app/code/Magento/CatalogGraphQl/Model/Resolver/Categories.php
similarity index 97%
rename from app/code/Magento/CatalogGraphQl/Model/Resolver/Category.php
rename to app/code/Magento/CatalogGraphQl/Model/Resolver/Categories.php
index 7a4bd098f0129..378e7cb4c3673 100644
--- a/app/code/Magento/CatalogGraphQl/Model/Resolver/Category.php
+++ b/app/code/Magento/CatalogGraphQl/Model/Resolver/Categories.php
@@ -20,9 +20,9 @@
 use Magento\Framework\Reflection\DataObjectProcessor;
 
 /**
- * Resolver for categoriy objects the product is assigned to.
+ * Resolver for category objects the product is assigned to.
  */
-class Category implements ResolverInterface
+class Categories implements ResolverInterface
 {
     /**
      * @var Collection
diff --git a/app/code/Magento/CatalogGraphQl/Model/Resolver/Products/FilterArgument/ProductEntityAttributesForAst.php b/app/code/Magento/CatalogGraphQl/Model/Resolver/Products/FilterArgument/ProductEntityAttributesForAst.php
index c09b23e90d44e..a547f63b217fe 100644
--- a/app/code/Magento/CatalogGraphQl/Model/Resolver/Products/FilterArgument/ProductEntityAttributesForAst.php
+++ b/app/code/Magento/CatalogGraphQl/Model/Resolver/Products/FilterArgument/ProductEntityAttributesForAst.php
@@ -25,7 +25,7 @@ class ProductEntityAttributesForAst implements FieldEntityAttributesInterface
     /**
      * @var array
      */
-    private $additionalAttributes;
+    private $additionalAttributes = ['min_price', 'max_price', 'category_id'];
 
     /**
      * @param ConfigInterface $config
@@ -33,10 +33,10 @@ class ProductEntityAttributesForAst implements FieldEntityAttributesInterface
      */
     public function __construct(
         ConfigInterface $config,
-        array $additionalAttributes = ['min_price', 'max_price', 'category_id']
+        array $additionalAttributes = []
     ) {
         $this->config = $config;
-        $this->additionalAttributes = $additionalAttributes;
+        $this->additionalAttributes = array_merge($this->additionalAttributes, $additionalAttributes);
     }
 
     /**
diff --git a/app/code/Magento/CatalogGraphQl/etc/schema.graphqls b/app/code/Magento/CatalogGraphQl/etc/schema.graphqls
index 7c89e308cac8a..762861de94e67 100644
--- a/app/code/Magento/CatalogGraphQl/etc/schema.graphqls
+++ b/app/code/Magento/CatalogGraphQl/etc/schema.graphqls
@@ -278,7 +278,7 @@ interface ProductInterface @typeResolver(class: "Magento\\CatalogGraphQl\\Model\
     price: ProductPrices @doc(description: "A ProductPrices object, indicating the price of an item") @resolver(class: "Magento\\CatalogGraphQl\\Model\\Resolver\\Product\\Price")
     gift_message_available: String @doc(description: "Indicates whether a gift message is available")
     manufacturer: Int @doc(description: "A number representing the product's manufacturer")
-    categories: [CategoryInterface] @doc(description: "The categories assigned to a product") @resolver(class: "Magento\\CatalogGraphQl\\Model\\Resolver\\Category")
+    categories: [CategoryInterface] @doc(description: "The categories assigned to a product") @resolver(class: "Magento\\CatalogGraphQl\\Model\\Resolver\\Categories")
     canonical_url: String @doc(description: "Canonical URL") @resolver(class: "Magento\\CatalogGraphQl\\Model\\Resolver\\Product\\CanonicalUrl")
 }