diff --git a/include/sim.h b/include/sim.h
index 97a1238..dd186fe 100644
--- a/include/sim.h
+++ b/include/sim.h
@@ -16,7 +16,6 @@ double limit(double value, double upr, double lwr);
 
 // Any parameters that are constants should be declared here instead of
 // buried in code
-double const dt = 0.001;
 double const g = -9.81;
 
 bool sim(struct Vehicle &State, struct Vehicle &PrevState) {
@@ -71,6 +70,7 @@ bool sim(struct Vehicle &State, struct Vehicle &PrevState) {
 }
 
 void burnStartTimeCalc(Vehicle &State) {
+  double dt = State.stepSize;
   double velocity = State.vz;
   double h = 0;