diff --git a/app/code/Magento/Catalog/Model/Product/Attribute/OptionManagement.php b/app/code/Magento/Catalog/Model/Product/Attribute/OptionManagement.php
index f2039a5002dcc..6cca2c07e2dd8 100644
--- a/app/code/Magento/Catalog/Model/Product/Attribute/OptionManagement.php
+++ b/app/code/Magento/Catalog/Model/Product/Attribute/OptionManagement.php
@@ -47,7 +47,7 @@ public function add($attributeCode, $option)
                 /** @var \Magento\Eav\Api\Data\AttributeOptionInterface $attributeOption */
                     $attributeOption = $attributeOption->getLabel();
             });
-            if (in_array($option->getLabel(), $currentOptions)) {
+            if (in_array($option->getLabel(), $currentOptions, true)) {
                 return false;
             }
         }