diff --git a/src/wp-includes/session.php b/src/wp-includes/session.php
index 81a1c694ae..ea44c0b3e9 100644
--- a/src/wp-includes/session.php
+++ b/src/wp-includes/session.php
@@ -181,7 +181,7 @@ abstract class WP_Session_Tokens {
 	 */
 	final public static function destroy_all_tokens_for_all_users() {
 		$manager = apply_filters( 'session_token_manager', 'WP_User_Meta_Session_Tokens' );
-		$manager::drop_sessions();
+		call_user_func( array( $manager, 'drop_sessions' ) );
 	}
 
 	/**