diff --git a/lib/OrdinaryDiffEqCore/src/alg_utils.jl b/lib/OrdinaryDiffEqCore/src/alg_utils.jl
index c1c2a8a977..048bd46b01 100644
--- a/lib/OrdinaryDiffEqCore/src/alg_utils.jl
+++ b/lib/OrdinaryDiffEqCore/src/alg_utils.jl
@@ -171,8 +171,8 @@ end
 
 _get_fwd_chunksize(::Type{AutoForwardDiff{CS, T}}) where {CS, T} = Val(CS)
 _get_fwd_chunksize_int(::Type{AutoForwardDiff{CS, T}}) where {CS, T} = CS
-_get_fwd_chunksize(AD) = Val(nothing)
-_get_fwd_chunksize_int(AD) = nothing
+_get_fwd_chunksize(AD) = Val(1)
+_get_fwd_chunksize_int(AD) = 1
 _get_fwd_tag(::AutoForwardDiff{CS,T}) where {CS,T} = T
 
 _get_fdtype(::AutoFiniteDiff{T1, T2, T3}) where {T1, T2, T3} = T1