diff --git a/classes/ETL/VariableStore.php b/classes/ETL/VariableStore.php
index 179ecdf996..9394076868 100644
--- a/classes/ETL/VariableStore.php
+++ b/classes/ETL/VariableStore.php
@@ -54,7 +54,7 @@ public function __construct($store = null, Log $logger = null)
 
         if ( null === $store ) {
             return;
-        } elseif ( is_array($store) || $store instanceof VariableStore || $store instanceof \Traversable ) {
+        } elseif ( is_array($store) || $store instanceof \stdClass || $store instanceof VariableStore || $store instanceof \Traversable ) {
             foreach ( $store as $variable => $value ) {
                 $this->$variable = $value;
             }