diff --git a/src/solve.jl b/src/solve.jl
index 787ad68c2..722442696 100644
--- a/src/solve.jl
+++ b/src/solve.jl
@@ -1304,7 +1304,7 @@ end
 hasdualpromote(u0, t) = true
 
 function promote_f(f::SplitFunction, ::Val{specialize}, u0, p, t) where {specialize}
-    typeof(f.cache) === typeof(u0) && isinplace(f) ? f : remake(f, cache = zero(u0))
+    typeof(f._func_cache) === typeof(u0) && isinplace(f) ? f : remake(f, _func_cache = zero(u0))
 end
 prepare_alg(alg, u0, p, f) = alg
 
diff --git a/test/forwarddiff_dual_detection.jl b/test/forwarddiff_dual_detection.jl
index 1fc50fefd..009ee6f2a 100644
--- a/test/forwarddiff_dual_detection.jl
+++ b/test/forwarddiff_dual_detection.jl
@@ -383,7 +383,7 @@ end
 # totallength
 val = rand(10)
 par = rand(10)
-u = Dual.(val, par)
+u = ForwardDiff.Dual.(val, par)
 @test DiffEqBase.totallength(val[1]) == 1
 @test DiffEqBase.totallength(val) == length(val)
 @test DiffEqBase.totallength(par) == length(par)