diff --git a/src/general-info/release-21d.md b/src/general-info/release-21d.md
index fd288ca1d9140d732e67d46e7e8ed5f2ee4a224d..751b4e19573c8057967c1440eac8bfa3d18cb461 100644
--- a/src/general-info/release-21d.md
+++ b/src/general-info/release-21d.md
@@ -19,6 +19,7 @@ public domain.
 ## New in this release:
   * Known issues:
   * Feature enhancements
+    * Update to ASDF 3.3.1, fixing issues introduced in 3.3.0
   * Changes
   * ANSI compliance fixes:
   * Bug fixes: