diff --git a/Sming/system/include/esp_systemapi.h b/Sming/system/include/esp_systemapi.h
index efb6189d2d..4c964a2a54 100644
--- a/Sming/system/include/esp_systemapi.h
+++ b/Sming/system/include/esp_systemapi.h
@@ -3,7 +3,7 @@
 #ifndef __ESP_SYSTEM_API_H__
 #define __ESP_SYSTEM_API_H__
 
-#include "ets_sys.h"
+#include <ets_sys.h>
 #include <osapi.h>
 #include <gpio.h>
 #include <os_type.h>