diff --git a/src/ADTypes.jl b/src/ADTypes.jl
index 63d7039..30a5c1d 100644
--- a/src/ADTypes.jl
+++ b/src/ADTypes.jl
@@ -14,6 +14,10 @@ abstract type AbstractSparseReverseMode <: AbstractReverseMode end
 abstract type AbstractSparseForwardMode <: AbstractForwardMode end
 abstract type AbstractSparseFiniteDifferences <: AbstractFiniteDifferencesMode end
 
+Base.@kwdef struct AutoChainRules{RC} <: AbstractADType
+    ruleconfig::RC
+end
+
 Base.@kwdef struct AutoFiniteDiff{T1, T2, T3} <: AbstractFiniteDifferencesMode
     fdtype::T1 = Val(:forward)
     fdjtype::T2 = fdtype
@@ -78,7 +82,8 @@ Base.@kwdef struct AutoSparseReverseDiff <: AbstractSparseReverseMode
     compile::Bool = false
 end
 
-export AutoFiniteDiff,
+export AutoChainRules,
+       AutoFiniteDiff,
        AutoFiniteDifferences,
        AutoForwardDiff,
        AutoReverseDiff,
diff --git a/test/runtests.jl b/test/runtests.jl
index f7d6fe8..2d874fc 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -4,6 +4,11 @@ using Test
 struct CustomTag end
 
 @testset "ADTypes.jl" begin
+    adtype = AutoChainRules(:ruleconfig_placeholder)
+    @test adtype isa ADTypes.AbstractADType
+    @test adtype isa AutoChainRules
+    @test adtype.ruleconfig == :ruleconfig_placeholder
+
     adtype = AutoFiniteDiff()
     @test adtype isa ADTypes.AbstractADType
     @test adtype isa AutoFiniteDiff