diff --git a/docs/archive-changelog.rst b/docs/archive-changelog.rst
--- a/docs/archive-changelog.rst
+++ b/docs/archive-changelog.rst
@@ -10,6 +10,11 @@
 anomalies or other changes in archival behavior over time. They are collected
 in this document for historical reasons.
 
+2021
+----
+
+* **2021-06-01** Started the sourceforge ingestion (tracking: `T735
+  <https://forge.softwareheritage.org/T735>`__)
 
 2020
 ----