diff --git a/readme.txt b/readme.txt
index 87a769e35..9e19120c5 100644
--- a/readme.txt
+++ b/readme.txt
@@ -99,6 +99,8 @@
   to 2.6.3).
 - FIX: Fixed race condition in STM32 OTG driver (bug #457)(backported
   to 2.6.3).
+- FIX: Fixed switch to LAN8710A PHY for STM32-E407 boards (bug #456)
+  (backported to 2.6.3).
 - FIX: Fixed add PHY id of LAN8710A (bug #455)(backported to 2.6.3).
 - FIX: Fixed memstreams.c missing from simulator makefiles (bug #454)
   (backported to 2.6.3).