diff --git a/arch/xtensa/src/esp32/Kconfig b/arch/xtensa/src/esp32/Kconfig
index fef0c6b9000..a0a5f396aed 100644
--- a/arch/xtensa/src/esp32/Kconfig
+++ b/arch/xtensa/src/esp32/Kconfig
@@ -982,7 +982,10 @@ config ESP32_RT_TIMER_TASK_NAME
 
 config ESP32_RT_TIMER_TASK_PRIORITY
 	int "Timer task priority"
-	default 223 # Lower than high priority workqueue
+	default 223
+	---help---
+		Priority level of the RT Timer task.
+		Must be lower than the SCHED_HPWORKPRIORITY.
 
 config ESP32_RT_TIMER_TASK_STACK_SIZE
 	int "Timer task stack size"