diff --git a/src/cuda/cuda.jl b/src/cuda/cuda.jl
index dc5ca272..0065f17b 100644
--- a/src/cuda/cuda.jl
+++ b/src/cuda/cuda.jl
@@ -2,6 +2,10 @@ module CUDA
 
 using ..CuArrays
 
+if !applicable(CuArray{UInt8}, undef, 1)
+  (T::Type{<:CuArray})(::UndefInitializer, sz...) = T(sz...)
+end
+
 if CuArrays.libcudnn != nothing
   include("cudnn.jl")
 else