diff --git a/src/recipes.jl b/src/recipes.jl
index 02221cac..2a44b6df 100644
--- a/src/recipes.jl
+++ b/src/recipes.jl
@@ -47,7 +47,7 @@ end
 num_series(x::AMat) = size(x,2)
 num_series(x) = 1
 
-RecipesBase.apply_recipe{T}(d::KW, ::Type{T}, plt::Plot) = throw(MethodError("Unmatched plot recipe: $T"))
+RecipesBase.apply_recipe{T}(d::KW, ::Type{T}, plt::AbstractPlot) = throw(MethodError("Unmatched plot recipe: $T"))
 
 # ---------------------------------------------------------------------------
 
diff --git a/src/types.jl b/src/types.jl
index 06ddb065..3e07587b 100644
--- a/src/types.jl
+++ b/src/types.jl
@@ -8,10 +8,6 @@ const KW = Dict{Symbol,Any}
 
 immutable PlotsDisplay <: Display end
 
-abstract type AbstractBackend end
-abstract type AbstractPlot{T<:AbstractBackend} end
-abstract type AbstractLayout end
-
 # -----------------------------------------------------------
 
 immutable InputWrapper{T}