diff --git a/TFT_eSPI/examples/FactoryTest/FactoryTest.ino b/TFT_eSPI/examples/FactoryTest/FactoryTest.ino
index 35d0ec7..6d4f6b5 100644
--- a/TFT_eSPI/examples/FactoryTest/FactoryTest.ino
+++ b/TFT_eSPI/examples/FactoryTest/FactoryTest.ino
@@ -3,7 +3,7 @@
 #include "WiFi.h"
 #include <Wire.h>
 #include "Button2.h"
-#include "esp_adc_cal.h"
+#include <esp_adc_cal.h>
 #include "bmp.h"