diff --git a/src/Security/MemberAuthenticator/SessionAuthenticationHandler.php b/src/Security/MemberAuthenticator/SessionAuthenticationHandler.php
index ef5008ee6..a192f7a71 100644
--- a/src/Security/MemberAuthenticator/SessionAuthenticationHandler.php
+++ b/src/Security/MemberAuthenticator/SessionAuthenticationHandler.php
@@ -60,7 +60,7 @@ class SessionAuthenticationHandler implements AuthenticationHandler
             return null;
         }
         /** @var Member $member */
-        $member = DataObject::get_by_id("SilverStripe\\Security\\Member", $id);
+        $member = DataObject::get_by_id(Member::class, $id);
         return $member;
     }