diff --git a/src/sundials/sundials_stepper_impl.h b/src/sundials/sundials_stepper_impl.h
index 5262b5eaa8..4e4834a3e1 100644
--- a/src/sundials/sundials_stepper_impl.h
+++ b/src/sundials/sundials_stepper_impl.h
@@ -28,7 +28,6 @@ struct SUNStepper_Ops_
   SUNStepperFullRhsFn fullrhs;
   SUNStepperResetFn reset;
   SUNStepperSetStopTimeFn setstoptime;
-  SUNStepperSetStepDirectionFn setstepdirection;
   SUNStepperSetForcingFn setforcing;
   SUNStepperDestroyFn destroy;
 };