diff --git a/doc/shared/sunstepper/SUNStepper_Description.rst b/doc/shared/sunstepper/SUNStepper_Description.rst
index 26d7cacc1a..5cc709e4f5 100644
--- a/doc/shared/sunstepper/SUNStepper_Description.rst
+++ b/doc/shared/sunstepper/SUNStepper_Description.rst
@@ -306,7 +306,7 @@ This section describes the virtual methods defined by the :c:type:`SUNStepper`
 abstract base class.
 
 
-.. c:type:: SUNErrCode (*SUNStepperEvolveFn)(SUNStepper stepper, sunrealtype tout, N_Vector v, sunrealtype* tret, int* stop_reason)
+.. c:type:: SUNErrCode (*SUNStepperEvolveFn)(SUNStepper stepper, sunrealtype tout, N_Vector vret, sunrealtype* tret)
 
    This type represents a function with the signature of
    :c:func:`SUNStepper_Evolve`.
diff --git a/include/sundials/sundials_stepper.h b/include/sundials/sundials_stepper.h
index 09ffbd4fd3..3b109dae3e 100644
--- a/include/sundials/sundials_stepper.h
+++ b/include/sundials/sundials_stepper.h
@@ -29,7 +29,7 @@ typedef int (*SUNJacTimesFn)(N_Vector v, N_Vector Jv, sunrealtype t, N_Vector y,
 typedef _SUNDIALS_STRUCT_ SUNStepper_* SUNStepper;
 
 typedef SUNErrCode (*SUNStepperEvolveFn)(SUNStepper stepper, sunrealtype tout,
-                                         N_Vector vout, sunrealtype* tret);
+                                         N_Vector vret, sunrealtype* tret);
 
 typedef SUNErrCode (*SUNStepperFullRhsFn)(SUNStepper stepper, sunrealtype t,
                                           N_Vector v, N_Vector f);
@@ -55,7 +55,7 @@ SUNErrCode SUNStepper_Destroy(SUNStepper* stepper);
 
 SUNDIALS_EXPORT
 SUNErrCode SUNStepper_Evolve(SUNStepper stepper, sunrealtype tout,
-                             N_Vector vout, sunrealtype* tret);
+                             N_Vector vret, sunrealtype* tret);
 
 SUNDIALS_EXPORT
 SUNErrCode SUNStepper_FullRhs(SUNStepper stepper, sunrealtype t, N_Vector v,
diff --git a/src/sundials/fmod_int32/fsundials_core_mod.f90 b/src/sundials/fmod_int32/fsundials_core_mod.f90
index d9671dafcc..3b5b29e96d 100644
--- a/src/sundials/fmod_int32/fsundials_core_mod.f90
+++ b/src/sundials/fmod_int32/fsundials_core_mod.f90
@@ -4988,13 +4988,13 @@ function FSUNStepper_Destroy(stepper) &
 swig_result = fresult
 end function
 
-function FSUNStepper_Evolve(stepper, tout, vout, tret) &
+function FSUNStepper_Evolve(stepper, tout, vret, tret) &
 result(swig_result)
 use, intrinsic :: ISO_C_BINDING
 integer(C_INT) :: swig_result
 type(C_PTR) :: stepper
 real(C_DOUBLE), intent(in) :: tout
-type(N_Vector), target, intent(inout) :: vout
+type(N_Vector), target, intent(inout) :: vret
 real(C_DOUBLE), dimension(*), target, intent(inout) :: tret
 integer(C_INT) :: fresult 
 type(C_PTR) :: farg1 
@@ -5004,7 +5004,7 @@ function FSUNStepper_Evolve(stepper, tout, vout, tret) &
 
 farg1 = stepper
 farg2 = tout
-farg3 = c_loc(vout)
+farg3 = c_loc(vret)
 farg4 = c_loc(tret(1))
 fresult = swigc_FSUNStepper_Evolve(farg1, farg2, farg3, farg4)
 swig_result = fresult
diff --git a/src/sundials/fmod_int64/fsundials_core_mod.f90 b/src/sundials/fmod_int64/fsundials_core_mod.f90
index 3837176437..8d71102c89 100644
--- a/src/sundials/fmod_int64/fsundials_core_mod.f90
+++ b/src/sundials/fmod_int64/fsundials_core_mod.f90
@@ -4988,13 +4988,13 @@ function FSUNStepper_Destroy(stepper) &
 swig_result = fresult
 end function
 
-function FSUNStepper_Evolve(stepper, tout, vout, tret) &
+function FSUNStepper_Evolve(stepper, tout, vret, tret) &
 result(swig_result)
 use, intrinsic :: ISO_C_BINDING
 integer(C_INT) :: swig_result
 type(C_PTR) :: stepper
 real(C_DOUBLE), intent(in) :: tout
-type(N_Vector), target, intent(inout) :: vout
+type(N_Vector), target, intent(inout) :: vret
 real(C_DOUBLE), dimension(*), target, intent(inout) :: tret
 integer(C_INT) :: fresult 
 type(C_PTR) :: farg1 
@@ -5004,7 +5004,7 @@ function FSUNStepper_Evolve(stepper, tout, vout, tret) &
 
 farg1 = stepper
 farg2 = tout
-farg3 = c_loc(vout)
+farg3 = c_loc(vret)
 farg4 = c_loc(tret(1))
 fresult = swigc_FSUNStepper_Evolve(farg1, farg2, farg3, farg4)
 swig_result = fresult