diff --git a/core/model/SiteTree.php b/core/model/SiteTree.php
index 0c55b6676..b06acc3a3 100755
--- a/core/model/SiteTree.php
+++ b/core/model/SiteTree.php
@@ -1032,6 +1032,7 @@ class SiteTree extends DataObject implements PermissionProvider,i18nEntityProvid
 			// Get the groups that the given member belongs to
 			$groupIDs = DataObject::get_by_id('Member', $memberID)->Groups()->column("ID");
 			$SQL_groupList = implode(", ", $groupIDs);
+			if (!$SQL_groupList) $SQL_groupList = '0';
 			
 			$combinedStageResult = array();