diff --git a/lib/internal/Magento/Framework/DB/Select.php b/lib/internal/Magento/Framework/DB/Select.php
index e28786568cc2c..1b0fc1a9ff7fa 100644
--- a/lib/internal/Magento/Framework/DB/Select.php
+++ b/lib/internal/Magento/Framework/DB/Select.php
@@ -115,7 +115,7 @@ public function where($cond, $value = null, $type = null)
     {
         if ($value === null && $type === null) {
             $value = '';
-        } elseif ($type == self::TYPE_CONDITION) {
+        } elseif ((string)$type === self::TYPE_CONDITION) {
             $type = null;
         }
         if (is_array($value)) {