diff --git a/ch05.jl b/ch05.jl
index 88a2152..eb2c3b9 100644
--- a/ch05.jl
+++ b/ch05.jl
@@ -33,7 +33,7 @@ map(*, [1, 2, 3], [4, 5])
 
 [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] .* [1 2 3 4 5 6 7 8 9 10]
 
-["x", "y", "z"] .=> [sum minimum maximum]
+["x", "y"] .=> [sum minimum maximum]
 
 abs.([1, -2, 3, -4])