diff --git a/src/cows/fox.cow.jl b/src/cows/fox.cow.jl
index bb810d2..258628f 100644
--- a/src/cows/fox.cow.jl
+++ b/src/cows/fox.cow.jl
@@ -3,7 +3,7 @@
 
 # Example
 
-```
+```jldoctest
 julia> cowsay("What does the fox say?", cow=Cowsay.fox)
  ________________________
 < What does the fox say? >