diff --git a/car.capnp b/car.capnp
index 2730888..9181e01 100644
--- a/car.capnp
+++ b/car.capnp
@@ -166,6 +166,8 @@ struct CarState {
   # gas pedal, 0.0-1.0
   gas @3 :Float32;        # this is user pedal only
   gasPressed @4 :Bool;    # this is user pedal only
+  
+  engineRpm @46 :Float32;
 
   # brake pedal, 0.0-1.0
   brake @5 :Float32;      # this is user pedal only