diff --git a/docs/release-notes/rl-2505.md b/docs/release-notes/rl-2505.md
index 977e853c..2ec0f1ad 100644
--- a/docs/release-notes/rl-2505.md
+++ b/docs/release-notes/rl-2505.md
@@ -27,4 +27,8 @@ The state version in this release includes the changes below. These
 changes are only active if the `home.stateVersion` option is set to
 \"25.05\" or later.
 
-- No changes.
+- The [](#opt-programs.git.signing.format) option no longer defaults to
+  `"openpgp"`. Users who use Git signing with GPG should explicitly set
+  this option to `"openpgp"` to maintain the previous behavior. Users
+  with `home.stateVersion` set to earlier versions will continue to get
+  the `"openpgp"` default for backwards compatibility.