1 files changed, 2 insertions, 0 deletions

diff --git a/packages/sundials/src/helpers.h b/packages/sundials/src/helpers.h
index ec11355..87b0c81 100644
--- a/packages/sundials/src/helpers.h
+++ b/packages/sundials/src/helpers.h
@@ -25,3 +25,5 @@ int f(realtype t, N_Vector y, N_Vector ydot, void *user_data);
 int Jac(realtype t, N_Vector y, N_Vector fy, SUNMatrix J,
         void *user_data, N_Vector tmp1, N_Vector tmp2, N_Vector tmp3);
 
+/* check the computed solution */
+int check_ans(N_Vector y, realtype t, realtype rtol, realtype atol);