diff --git a/app/code/Magento/Rule/Model/AbstractModel.php b/app/code/Magento/Rule/Model/AbstractModel.php
index e29d2b217d717..d54bcf691d3b0 100644
--- a/app/code/Magento/Rule/Model/AbstractModel.php
+++ b/app/code/Magento/Rule/Model/AbstractModel.php
@@ -335,7 +335,7 @@ protected function _convertFlatToRecursive(array $data)
                 /**
                  * Convert dates into \DateTime
                  */
-                if (in_array($key, ['from_date', 'to_date']) && $value) {
+                if (in_array($key, ['from_date', 'to_date'], true) && $value) {
                     $value = new \DateTime($value);
                 }
                 $this->setData($key, $value);