diff --git a/readme.txt b/readme.txt
index f80411fba..ed3562450 100644
--- a/readme.txt
+++ b/readme.txt
@@ -78,6 +78,7 @@
        sufficient to call lwipInit(NULL); in order to start the subsystem.
        Demo updated.
 - RT:  Fixed compilation error in RT when registry is disabled (bug #614).
+- NIL: Fixed OSAL_ST_MODE not defined in AVR port (bug #613).
 - NIL: Fixed nilrtos redefinition of systime_t (bug #611).
 - HAL: Fixed TIM2 wrongly classified as 32bits in STM32F1xx devices
        (bug #610).