diff --git a/doc/release-notes.md b/doc/release-notes.md
index a29094b51..c684ffc77 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -4,3 +4,18 @@ release-notes at release time)
 Notable changes
 ===============
 
+zcash-cli: arguments privacy
+----------------------------
+
+The RPC command line client gained a new argument, `-stdin`
+to read extra arguments from standard input, one per line until EOF/Ctrl-D.
+For example:
+
+    $ src/zcash-cli -stdin walletpassphrase
+    mysecretcode
+    120
+    ^D (Ctrl-D)
+
+It is recommended to use this for sensitive information such as private keys, as
+command-line arguments can usually be read from the process table by any user on
+the system.