diff --git a/core/model/SiteTree.php b/core/model/SiteTree.php
index 1633ac2f1..74db7243b 100755
--- a/core/model/SiteTree.php
+++ b/core/model/SiteTree.php
@@ -1098,6 +1098,8 @@ class SiteTree extends DataObject implements PermissionProvider,i18nEntityProvid
 	static function can_delete_multiple($ids, $memberID, $useCached = true) {
 		$deletable = array();
 		
+		$result = array_fill_keys($ids, false); 
+		
 		// Look in the cache for values
 		if($useCached && isset(self::$cache_permissions['delete'])) {
 			$cachedValues = array_intersect_key(self::$cache_permissions['delete'], $result);