diff --git a/cores/esp32/esp32-hal-ledc.h b/cores/esp32/esp32-hal-ledc.h
index c81da6dced2..2d2c42e9369 100644
--- a/cores/esp32/esp32-hal-ledc.h
+++ b/cores/esp32/esp32-hal-ledc.h
@@ -24,6 +24,8 @@ extern "C" {
 
 #include <stdint.h>
 #include <stdbool.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
 
 typedef enum {
     NOTE_C, NOTE_Cs, NOTE_D, NOTE_Eb, NOTE_E, NOTE_F, NOTE_Fs, NOTE_G, NOTE_Gs, NOTE_A, NOTE_Bb, NOTE_B, NOTE_MAX