diff --git a/class-two-factor-core.php b/class-two-factor-core.php
index 846cff49..3b01913c 100644
--- a/class-two-factor-core.php
+++ b/class-two-factor-core.php
@@ -699,7 +699,7 @@ public static function filter_authenticate( $user, $username, $password ) {
 			}
 
 			// Trigger the second-factor flow for valid users.
-			add_action( 'wp_login', array( __CLASS__, 'wp_login' ), 10, 2 );
+			add_action( 'wp_login', array( __CLASS__, 'wp_login' ), PHP_INT_MAX, 2 );
 		}
 
 		return $user;