diff --git a/model/ArrayList.php b/model/ArrayList.php
index 784fb55ce..b15e3b04c 100644
--- a/model/ArrayList.php
+++ b/model/ArrayList.php
@@ -448,7 +448,8 @@ class ArrayList extends ViewableData implements SS_List, SS_Filterable, SS_Sorta
 			// First argument is the direction to be sorted,
 			$multisortArgs[] = &$sortDirection[$column];
 			if ($firstRun) {
-				$multisortArgs[] = SORT_REGULAR;
+				$sortArg = SORT_REGULAR;
+				$multisortArgs[] = &$sortArg;
 			}
 			$firstRun = false;
 		}