diff --git a/y2012/wpilib/wpilib_interface.cc b/y2012/wpilib/wpilib_interface.cc
index 6ed3bb3..a9b7bf6 100644
--- a/y2012/wpilib/wpilib_interface.cc
+++ b/y2012/wpilib/wpilib_interface.cc
@@ -120,7 +120,7 @@
   }
 
   void RunIteration() {
-    ::frc971::wpilib::SendRobotState(my_pid_, ds_, nullptr);
+    ::frc971::wpilib::SendRobotState(my_pid_, ds_);
 
     {
       auto drivetrain_message = drivetrain_queue.position.MakeMessage();