diff --git a/wpimath/src/main/proto/controller.proto b/wpimath/src/main/proto/controller.proto
index 0d0d3fb6fff..dd9db5f3110 100644
--- a/wpimath/src/main/proto/controller.proto
+++ b/wpimath/src/main/proto/controller.proto
@@ -29,6 +29,7 @@ message ProtobufSimpleMotorFeedforward {
   double ks = 1;
   double kv = 2;
   double ka = 3;
+  double dt = 4;
 }
 
 message ProtobufDifferentialDriveWheelVoltages {