diff --git a/src/layers/normalise.jl b/src/layers/normalise.jl
index a612c4579e..00471bcec2 100644
--- a/src/layers/normalise.jl
+++ b/src/layers/normalise.jl
@@ -121,7 +121,7 @@ function Base.show(io::IO, d::Dropout)
 end
 
 """
-    AlphaDropout(p; rng = _rng_from_array())
+    AlphaDropout(p; [rng])
 
 A dropout layer. Used in
 [Self-Normalizing Neural Networks](https://arxiv.org/abs/1706.02515).