diff --git a/Classes/ViewHelpers/ProgressViewHelper.php b/Classes/ViewHelpers/ProgressViewHelper.php
index 20ac46b..3cae5fb 100644
--- a/Classes/ViewHelpers/ProgressViewHelper.php
+++ b/Classes/ViewHelpers/ProgressViewHelper.php
@@ -57,6 +57,9 @@ class ProgressViewHelper extends AbstractViewHelper
         //handling famous off by one
         $activeStep -= $offset;
         //make sure our array index is numeric
+        if (\is_iterable($links)) {
+            $links = \iterator_to_array($links);
+        }
         $links = \array_values($links);
         if (!$linkCount) {
             $linkCount = \count($links);