diff --git a/acqui/duplicate_orders.pl b/acqui/duplicate_orders.pl
index 549c8b495a..c3b86b82ec 100755
--- a/acqui/duplicate_orders.pl
+++ b/acqui/duplicate_orders.pl
@@ -65,8 +65,9 @@ my $filters = {
     orderstatus             => scalar $input->param('orderstatus'),
     ordernumber             => scalar $input->param('ordernumber'),
     search_children_too     => scalar $input->param('search_children_too'),
-    created_by              => scalar $input->multi_param('created_by'),
+    created_by              => [$input->multi_param('created_by')]
 };
+
 my $from_placed_on =
   eval { dt_from_string( scalar $input->param('from') ) } || dt_from_string;
 my $to_placed_on =