diff --git a/y2016/control_loops/python/drivetrain.py b/y2016/control_loops/python/drivetrain.py
index 94905a2..bb86625 100755
--- a/y2016/control_loops/python/drivetrain.py
+++ b/y2016/control_loops/python/drivetrain.py
@@ -341,6 +341,10 @@
           drivetrain_low_low.Kv))
     dog_loop_writer.AddConstant(control_loop.Constant("kT", "%f",
           drivetrain_low_low.Kt))
+    dog_loop_writer.AddConstant(control_loop.Constant("kLowGearRatio", "%f",
+          drivetrain_low_low.G_low))
+    dog_loop_writer.AddConstant(control_loop.Constant("kHighGearRatio", "%f",
+          drivetrain_high_high.G_high))
 
     dog_loop_writer.Write(argv[1], argv[2])