diff --git a/readme.txt b/readme.txt
index e7570882c..de02a8089 100644
--- a/readme.txt
+++ b/readme.txt
@@ -120,6 +120,7 @@
 - RT:  Merged RT4.
 - NIL: Merged NIL2.
 - NIL: Added STM32F7 demo.
+- HAL: Fixed dependency on RT in hal_usb.c (bug #764)(backported to 16.1.6).
 - HAL: Fixed wrong backup domain reset in STM32L4xx\hal_lld (bug #763)
        (backported to 16.1.6).
 - HAL: Fixed wrong PWR configurations in STM32L4xx\hal_lld (bug #761)