diff --git a/wpimath/src/main/native/include/frc/controller/ElevatorFeedforward.h b/wpimath/src/main/native/include/frc/controller/ElevatorFeedforward.h
index 11fbc77259..269a7e635a 100644
--- a/wpimath/src/main/native/include/frc/controller/ElevatorFeedforward.h
+++ b/wpimath/src/main/native/include/frc/controller/ElevatorFeedforward.h
@@ -6,6 +6,7 @@
 
 #include <wpi/MathExtras.h>
 
+#include "units/time.h"
 #include "units/voltage.h"
 
 namespace frc {