diff --git a/docs/changelog.txt b/docs/changelog.txt
index 586b784..d1a3350 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -2,6 +2,10 @@ changelog
 
 === next
 
++ Fix double htmlization of subject lines.
+
+- Some existing posts will now have duplicated subjects.
+
 + Remove the wonk support. Fun's over, back to work.
 
 + All inclusive danger zone spoiler alerts.