diff --git a/TODO b/TODO
index 563d566c57..820fecb4b0 100644
--- a/TODO
+++ b/TODO
@@ -69,6 +69,9 @@ Features:
 
 * set ProtectSystem=strict for all our usual services.
 
+* fix PrivateNetwork= so that we fall back gracefully on kernels lacking
+  namespacing support (similar for the other namespacing options)
+
 * maybe add gpt-partition-based user management: each user gets his own
   LUKS-encrypted GPT partition with a new GPT type. A small nss module
   enumerates users via udev partition enumeration. UIDs are assigned in a fixed