diff --git a/demos/STM32/RT-STM32F401RE-NUCLEO64/main.c b/demos/STM32/RT-STM32F401RE-NUCLEO64/main.c
index 00057b532..e5c0f1fcb 100644
--- a/demos/STM32/RT-STM32F401RE-NUCLEO64/main.c
+++ b/demos/STM32/RT-STM32F401RE-NUCLEO64/main.c
@@ -57,7 +57,7 @@ int main(void) {
   /*
    * Creates the blinker thread.
    */
-  chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
+  chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO + 1, Thread1, NULL);
 
   /*
    * Normal main() thread activity, in this demo it does nothing except
diff --git a/readme.txt b/readme.txt
index 52042da1c..7fb6ed659 100644
--- a/readme.txt
+++ b/readme.txt
@@ -89,6 +89,8 @@
 *****************************************************************************
 
 *** Next ***
+- VAR: Fixed priority issue in STM32 Nucleo-64 F401RE demo(bug #858)(backported 
+       to 17.6.1).
 - VAR: Fixed STM32L053 Discovery demo which is unaligned to standard demos (bug 
        #857)(backported to 17.6.1).
 - HAL: Fixed unaligned STM32F0xx mcuconf.h files (bug #855)(backported