diff --git a/os/hal/platforms/STM32/icu_lld.c b/os/hal/platforms/STM32/icu_lld.c
index 4767c493a..0f8bc4bc7 100644
--- a/os/hal/platforms/STM32/icu_lld.c
+++ b/os/hal/platforms/STM32/icu_lld.c
@@ -381,7 +381,7 @@ void icu_lld_start(ICUDriver *icup) {
       nvicEnableVector(TIM8_CC_IRQn,
                        CORTEX_PRIORITY_MASK(STM32_ICU_TIM8_IRQ_PRIORITY));
       nvicEnableVector(TIM8_UP_IRQn,
-                       CORTEX_PRIORITY_MASK(STM32_ICU_TIM1_IRQ_PRIORITY));
+                       CORTEX_PRIORITY_MASK(STM32_ICU_TIM8_IRQ_PRIORITY));
       icup->clock = STM32_TIMCLK2;
     }
 #endif
diff --git a/readme.txt b/readme.txt
index 62928eccb..9a3e647c6 100644
--- a/readme.txt
+++ b/readme.txt
@@ -79,6 +79,7 @@
 *****************************************************************************
 
 *** 2.4.2 ***
+- FIX: Fixed wrong priority assigned to TIM8 in STM32 ICU driver (bug 3536950).
 - FIX: Fixed TIM8 not working in STM32 GPT driver (bug 3536523).
 - FIX: Fixed timer overflow not working in STM32 ICU driver for TIM1/TIM8 (bug
   3536522).