diff --git a/docs/proposals/21-ipv6-singlestack-local.md b/docs/proposals/21-ipv6-singlestack-local.md
index 7478c5079a0..9db90092d8e 100644
--- a/docs/proposals/21-ipv6-singlestack-local.md
+++ b/docs/proposals/21-ipv6-singlestack-local.md
@@ -24,11 +24,12 @@ reviewers:
     * [Non-Goals](#non-goals)
   * [Proposal](#proposal)
     * [`Shoot` API](#shoot-api)
+      * [Future Dual-Stack Enhancements](#future-dual-stack-enhancements)
     * [`Seed` API](#seed-api)
+    * [`Network` API](#network-api)
     * [`DNSRecord` API](#dnsrecord-api)
     * [Implementation Overview](#implementation-overview)
       * [Preparing the Local Setup](#preparing-the-local-setup)
-      * [Scheduling](#scheduling)
       * [DNS Records](#dns-records)
       * [Network Policies](#network-policies)
       * [Shoot Worker Node Kernel Configuration](#shoot-worker-node-kernel-configuration)