diff --git a/code/model/SubsiteDomain.php b/code/model/SubsiteDomain.php
index b6af634..6f89573 100644
--- a/code/model/SubsiteDomain.php
+++ b/code/model/SubsiteDomain.php
@@ -6,6 +6,12 @@
  */
 class SubsiteDomain extends DataObject {
 
+	/**
+	 *
+	 * @var string
+	 */
+	private static $default_sort = "\"IsPrimary\" DESC";
+
 	/**
 	 *
 	 * @var array