diff --git a/src/ComputationalModels/Drivers.jl b/src/ComputationalModels/Drivers.jl
index 667901f..024431b 100644
--- a/src/ComputationalModels/Drivers.jl
+++ b/src/ComputationalModels/Drivers.jl
@@ -101,8 +101,8 @@ struct StaticNonlinearModel{A,B,C,D,E} <: ComputationalModel
         x = get_free_dof_values(xh)
         x⁻ = get_free_dof_values(xh⁻)
         # x⁻ = zero_free_values(U)
-        _res = res(0.0)
-        _jac = jac(0.0)
+        _res = res(1.0)
+        _jac = jac(1.0)
         op = get_algebraic_operator(FEOperator(_res, _jac, U, V, assem_U))
         nls_cache = instantiate_caches(x, nls, op)
         caches = (nls, nls_cache, x, x⁻, assem_U)
@@ -265,8 +265,8 @@ struct DynamicNonlinearModel{A,B,C,D,E,F} <: ComputationalModel
         x⁻ = zero_free_values(Uold)
         uh⁻ = FEFunction(Uold, x⁻)
         vuh = velocity()
-        _res = res(0.0, uh⁻, vuh)
-        _jac = jac(0.0, uh⁻, vuh)
+        _res = res(1.0, uh⁻, vuh)
+        _jac = jac(1.0, uh⁻, vuh)
         op = get_algebraic_operator(FEOperator(_res, _jac, U, V, assem_U))
         nls_cache = instantiate_caches(x, nls, op)
         caches = (nls, nls_cache, x, x⁻, assem_U, uh⁻)