diff --git a/src/structural_transformation/partial_state_selection.jl b/src/structural_transformation/partial_state_selection.jl
index f2fec0269f..bae8816b50 100644
--- a/src/structural_transformation/partial_state_selection.jl
+++ b/src/structural_transformation/partial_state_selection.jl
@@ -175,8 +175,8 @@ function dummy_derivative_graph!(state::TransformationState, jac = nothing;
     dummy_derivative_graph!(state.structure, var_eq_matching, jac, state_priority, log)
 end
 
-function dummy_derivative_graph!(structure::SystemStructure, var_eq_matching, jac,
-    state_priority, ::Val{log} = Val(false)) where {log}
+function dummy_derivative_graph!(structure::SystemStructure, var_eq_matching, jac = nothing,
+    state_priority = nothing, ::Val{log} = Val(false)) where {log}
     @unpack eq_to_diff, var_to_diff, graph = structure
     diff_to_eq = invview(eq_to_diff)
     diff_to_var = invview(var_to_diff)