diff --git a/src/shorthands.jl b/src/shorthands.jl
index 57bfe176..81d290c7 100644
--- a/src/shorthands.jl
+++ b/src/shorthands.jl
@@ -271,6 +271,7 @@ Draw a 3D surface plot.
 
 # Example
 ```julia-repl
+julia> using LinearAlgebra
 julia> x = y = range(-3, 3, length = 100)
 julia> surface(x, y, (x, y) -> sinc(norm([x, y])))
 ```