diff --git a/InventoryIndexer/Model/ResourceModel/UpdateIsSalable.php b/InventoryIndexer/Model/ResourceModel/UpdateIsSalable.php
index 4b2675f369d6..e2f0d7f39651 100644
--- a/InventoryIndexer/Model/ResourceModel/UpdateIsSalable.php
+++ b/InventoryIndexer/Model/ResourceModel/UpdateIsSalable.php
@@ -51,7 +51,7 @@ public function execute(IndexName $indexName, array $dataForUpdate, string $conn
         $connection = $this->resourceConnection->getConnection($connectionName);
         $tableName = $this->indexNameResolver->resolveName($indexName);
         foreach ($dataForUpdate as $sku => $isSalable) {
-            $connection->update($tableName, [IndexStructure::IS_SALABLE => $isSalable], ['sku = ?' => $sku]);
+            $connection->update($tableName, [IndexStructure::IS_SALABLE => $isSalable], ['sku = ?' => (string)$sku]);
         }
     }
 }