diff --git a/radio/src/gui/212x64/radio_calibration.cpp b/radio/src/gui/212x64/radio_calibration.cpp
index 3dcb9c27f..f6f6515c5 100644
--- a/radio/src/gui/212x64/radio_calibration.cpp
+++ b/radio/src/gui/212x64/radio_calibration.cpp
@@ -19,6 +19,7 @@
  */
 
 #include "opentx.h"
+#include "hal/adc_driver.h"
 
 #define XPOT_DELTA    10
 #define XPOT_DELAY    10 /* cycles */