diff --git a/src/Symfony/Component/Console/Helper/Table.php b/src/Symfony/Component/Console/Helper/Table.php
index 70ef04c0eb..d54f63684a 100644
--- a/src/Symfony/Component/Console/Helper/Table.php
+++ b/src/Symfony/Component/Console/Helper/Table.php
@@ -565,7 +565,7 @@ class Table
     /**
      * Calculates columns widths.
      */
-    private function calculateColumnsWidth(array $rows)
+    private function calculateColumnsWidth(iterable $rows)
     {
         for ($column = 0; $column < $this->numberOfColumns; ++$column) {
             $lengths = array();