diff --git a/system/src/Grav/Common/Flex/Types/Pages/PageCollection.php b/system/src/Grav/Common/Flex/Types/Pages/PageCollection.php
index ccee696cb..774a7109b 100644
--- a/system/src/Grav/Common/Flex/Types/Pages/PageCollection.php
+++ b/system/src/Grav/Common/Flex/Types/Pages/PageCollection.php
@@ -21,6 +21,7 @@ use Grav\Common\Utils;
 use Grav\Framework\Flex\Interfaces\FlexCollectionInterface;
 use Grav\Framework\Flex\Interfaces\FlexObjectInterface;
 use Grav\Framework\Flex\Pages\FlexPageCollection;
+use Collator;
 
 /**
  * Class GravPageCollection