diff --git a/doc/release-notes.md b/doc/release-notes.md
index 57067138b0..10d859395c 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -80,6 +80,8 @@ Updated settings
 
 Changes to Wallet or GUI related settings can be found in the GUI or Wallet section below.
 
+- Passing an invalid `-rpcauth` argument now cause bitcoind to fail to start.  (#20461)
+
 Tools and Utilities
 -------------------