diff --git a/ports/esp32s2/common-hal/microcontroller/__init__.c b/ports/esp32s2/common-hal/microcontroller/__init__.c
index e5cfc7eef0..dba12b88b2 100644
--- a/ports/esp32s2/common-hal/microcontroller/__init__.c
+++ b/ports/esp32s2/common-hal/microcontroller/__init__.c
@@ -42,7 +42,7 @@
 #include "freertos/FreeRTOS.h"
 
 void common_hal_mcu_delay_us(uint32_t delay) {
-
+    mp_hal_delay_us(delay);
 }
 
 volatile uint32_t nesting_count = 0;