diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -7,4 +7,5 @@
 This release includes the following features and fixes:
  - Netmasks that contain 1-bits after 0-bits (the 1-bits are not contiguous on
    the left side, e.g. 255.0.255.255) are no longer accepted. They are invalid
-   according to RFC 4632.
+   according to RFC 4632. Netmasks are used in the `-rpcallowip` and `-whitelist`
+   configuration options and in the `setban` RPC.