diff --git a/model/DataList.php b/model/DataList.php
index 9f1a83114..813a8453c 100644
--- a/model/DataList.php
+++ b/model/DataList.php
@@ -373,9 +373,9 @@ class DataList extends ViewableData implements SS_List, SS_Filterable, SS_Sortab
 	/**
 	 * Return a new instance of the list with an added filter
 	 *
-	 * @param  array $filterArray
+	 * @param array $filterArray
 	 */
-	public function addFilter(array $filterArray) {
+	public function addFilter($filterArray) {
 		$list = $this;
 
 		foreach($filterArray as $field => $value) {