diff --git a/src/Arrays/Autodiff.jl b/src/Arrays/Autodiff.jl
index 3b75dad42..7765864cb 100644
--- a/src/Arrays/Autodiff.jl
+++ b/src/Arrays/Autodiff.jl
@@ -21,7 +21,8 @@ function autodiff_array_hessian(a,i_to_x)
 end
 
 function autodiff_array_gradient(a,i_to_x,j_to_i)
-  i_to_xdual = lazy_map(DualizeMap(ForwardDiff.gradient),i_to_x)
+  T = Vector{ForwardDiff.Dual{Nothing, Float64, 4}} #,Vector{ForwardDiff.Dual{Nothing, Float64, 0}}}
+  i_to_xdual = lazy_map(DualizeMap(ForwardDiff.gradient),T,i_to_x)
   j_to_ydual = a(i_to_xdual)
   j_to_x = lazy_map(Reindex(i_to_x),j_to_i)
   j_to_cfg = lazy_map(ConfigMap(ForwardDiff.gradient),j_to_x)
diff --git a/src/FESpaces/FEAutodiff.jl b/src/FESpaces/FEAutodiff.jl
index 3a37dcb2f..baa706c48 100644
--- a/src/FESpaces/FEAutodiff.jl
+++ b/src/FESpaces/FEAutodiff.jl
@@ -81,7 +81,11 @@ end
 function _change_argument(op,f,trian,uh::SingleFieldFEFunction)
   U = get_fe_space(uh)
   function g(cell_u)
-    cf = CellField(U,cell_u)
+    v = get_fe_basis(U)
+    cell_basis = get_data(v)
+    T=typeof(cell_u)
+    cell_field = lazy_map(linear_combination,T,cell_u,cell_basis)
+    cf = GenericCellField(cell_field,get_triangulation(v),DomainStyle(v))
     cell_grad = f(cf)
     get_contribution(cell_grad,trian)
   end