diff --git a/src/layers/basic.jl b/src/layers/basic.jl
index 12d4e2e3..83eeee21 100644
--- a/src/layers/basic.jl
+++ b/src/layers/basic.jl
@@ -110,7 +110,7 @@ end
 (a::Dense{<:Any,W})(x::AbstractArray{T}) where {T <: Union{Float32,Float64}, W <: AbstractArray{T}} =
   invoke(a, Tuple{AbstractArray}, x)
 
-(a::Dense{<:Any,W})(x::AbstractArray{<:Real}) where {T <: Union{Float32,Float64}, W <: AbstractArray{T}} =
+(a::Dense{<:Any,W})(x::AbstractArray{<:AbstractFloat}) where {T <: Union{Float32,Float64}, W <: AbstractArray{T}} =
   a(T.(x))
 
 """