diff --git a/frc971/control_loops/drivetrain/drivetrain.cc b/frc971/control_loops/drivetrain/drivetrain.cc
index 64d6264..e85351e 100644
--- a/frc971/control_loops/drivetrain/drivetrain.cc
+++ b/frc971/control_loops/drivetrain/drivetrain.cc
@@ -18,6 +18,7 @@
 #include "frc971/control_loops/drivetrain/drivetrain.q.h"
 #include "frc971/queues/other_sensors.q.h"
 #include "frc971/constants.h"
+#include "frc971/shifter_hall_effect.h"
 
 using frc971::sensors::gyro_reading;