diff --git a/lib/NonlinearSolveBase/src/polyalg.jl b/lib/NonlinearSolveBase/src/polyalg.jl
index 1a6e1cfae..cc07248ce 100644
--- a/lib/NonlinearSolveBase/src/polyalg.jl
+++ b/lib/NonlinearSolveBase/src/polyalg.jl
@@ -117,9 +117,9 @@ end
 function SciMLBase.__init(
         prob::AbstractNonlinearProblem, alg::NonlinearSolvePolyAlgorithm, args...;
         stats = NLStats(0, 0, 0, 0, 0), maxtime = nothing, maxiters = 1000,
-        internalnorm = L2_NORM, alias_u0 = false, verbose = true,
+        internalnorm::IN = L2_NORM, alias_u0 = false, verbose = true,
         initializealg = NonlinearSolveDefaultInit(), kwargs...
-)
+) where {IN}
     if alias_u0 && !ArrayInterface.ismutable(prob.u0)
         verbose && @warn "`alias_u0` has been set to `true`, but `u0` is \
                           immutable (checked using `ArrayInterface.ismutable`)."
diff --git a/lib/NonlinearSolveFirstOrder/src/solve.jl b/lib/NonlinearSolveFirstOrder/src/solve.jl
index 56cbaac7b..4c08cf63b 100644
--- a/lib/NonlinearSolveFirstOrder/src/solve.jl
+++ b/lib/NonlinearSolveFirstOrder/src/solve.jl
@@ -124,9 +124,9 @@ function SciMLBase.__init(
         prob::AbstractNonlinearProblem, alg::GeneralizedFirstOrderAlgorithm, args...;
         stats = NLStats(0, 0, 0, 0, 0), alias_u0 = false, maxiters = 1000,
         abstol = nothing, reltol = nothing, maxtime = nothing,
-        termination_condition = nothing, internalnorm = L2_NORM,
+        termination_condition = nothing, internalnorm::IN = L2_NORM,
         linsolve_kwargs = (;), initializealg = NonlinearSolveBase.NonlinearSolveDefaultInit(), kwargs...
-)
+) where {IN}
     @set! alg.autodiff = NonlinearSolveBase.select_jacobian_autodiff(prob, alg.autodiff)
     provided_jvp_autodiff = alg.jvp_autodiff !== nothing
     @set! alg.jvp_autodiff = if !provided_jvp_autodiff && alg.autodiff !== nothing &&