diff --git a/include/waterlevel.h b/include/waterlevel.h
index 69cd0ab..9438d9d 100644
--- a/include/waterlevel.h
+++ b/include/waterlevel.h
@@ -3,6 +3,7 @@
 
 #include <Wire.h>
 #include <VL53L0X.h> //pololu/VL53L0X@^1.3.1
+#include <VL6180X.h> //https://github.com/pololu/vl6180x-arduino