diff --git a/doc/todo/aggregation.mdwn b/doc/todo/aggregation.mdwn
index 53b3133e2..371d20c12 100644
--- a/doc/todo/aggregation.mdwn
+++ b/doc/todo/aggregation.mdwn
@@ -1 +1,3 @@
 * Still need to support feed expiry.
+
+[[todo/done]]