diff --git a/src/layers/normalise.jl b/src/layers/normalise.jl
index fc781f70..0647e6b4 100644
--- a/src/layers/normalise.jl
+++ b/src/layers/normalise.jl
@@ -157,6 +157,8 @@ mutable struct BatchNorm{F,V,W,N}
   active::Union{Bool, Nothing}
 end
 
+BatchNorm(λ, β, γ, μ, σ², ϵ, momentum) = BatchNorm(λ, β, γ, μ, σ², ϵ, momentum, nothing)
+
 BatchNorm(chs::Integer, λ = identity;
           initβ = (i) -> zeros(Float32, i), initγ = (i) -> ones(Float32, i), ϵ = 1f-5, momentum = 0.1f0) =
   BatchNorm(λ, initβ(chs), initγ(chs),