diff --git a/boil_kettle/thermoControl.cpp b/boil_kettle/thermoControl.cpp
index 1585d76..482b682 100644
--- a/boil_kettle/thermoControl.cpp
+++ b/boil_kettle/thermoControl.cpp
@@ -1,5 +1,6 @@
 
 #include <Arduino.h>
+#include <Adafruit_MAX31865.h>
 #include "thermoControl.h"