diff --git a/src/Query/Builder.php b/src/Query/Builder.php
index f83bce3e2..3c60a071f 100644
--- a/src/Query/Builder.php
+++ b/src/Query/Builder.php
@@ -512,7 +512,7 @@ public function orderBy($column, $direction = 'asc')
         if ($column == 'natural') {
             $this->orders['$natural'] = $direction;
         } else {
-            $this->orders[$column] = $direction;
+            $this->orders[(string) $column] = $direction;
         }
 
         return $this;