diff --git a/firmware/config/stm32f4ems/mcuconf.h b/firmware/config/stm32f4ems/mcuconf.h
index 9f141afb9a..6befa3a076 100644
--- a/firmware/config/stm32f4ems/mcuconf.h
+++ b/firmware/config/stm32f4ems/mcuconf.h
@@ -143,18 +143,19 @@
 /*
  * EXT driver system settings.
  */
-#define STM32_EXT_EXTI0_IRQ_PRIORITY        PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI1_IRQ_PRIORITY        PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI2_IRQ_PRIORITY        PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI3_IRQ_PRIORITY        PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI4_IRQ_PRIORITY        PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI5_9_IRQ_PRIORITY      PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI10_15_IRQ_PRIORITY    PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI16_IRQ_PRIORITY       PRECISE_SCHEDULING_TIMER_PRIORITY + 2
+#define STM32_EXT_EXT_IRQ_PRIORITY          ICU_PRIORITY
+#define STM32_EXT_EXTI0_IRQ_PRIORITY        STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI1_IRQ_PRIORITY        STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI2_IRQ_PRIORITY        STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI3_IRQ_PRIORITY        STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI4_IRQ_PRIORITY        STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI5_9_IRQ_PRIORITY      STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI10_15_IRQ_PRIORITY    STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI16_IRQ_PRIORITY       STM32_EXT_EXT_IRQ_PRIORITY
 #define STM32_EXT_EXTI17_IRQ_PRIORITY       15
-#define STM32_EXT_EXTI18_IRQ_PRIORITY       PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI19_IRQ_PRIORITY       PRECISE_SCHEDULING_TIMER_PRIORITY + 2
-#define STM32_EXT_EXTI20_IRQ_PRIORITY       PRECISE_SCHEDULING_TIMER_PRIORITY + 2
+#define STM32_EXT_EXTI18_IRQ_PRIORITY       STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI19_IRQ_PRIORITY       STM32_EXT_EXT_IRQ_PRIORITY
+#define STM32_EXT_EXTI20_IRQ_PRIORITY       STM32_EXT_EXT_IRQ_PRIORITY
 #define STM32_EXT_EXTI21_IRQ_PRIORITY       15
 #define STM32_EXT_EXTI22_IRQ_PRIORITY       15