diff --git a/security/Member.php b/security/Member.php
index fa19ff2de..c7fe84abd 100644
--- a/security/Member.php
+++ b/security/Member.php
@@ -359,7 +359,7 @@ class Member extends DataObject implements TemplateGlobalProvider {
 	 * quirky problems (such as using the Windmill 0.3.6 proxy).
 	 */
 	public static function session_regenerate_id() {
-		if(!self::$session_regenerate_id) return;
+		if(!self::config()->session_regenerate_id) return;
 
 		// This can be called via CLI during testing.
 		if(Director::is_cli()) return;