diff --git a/src/ch04-01-what-is-ownership.md b/src/ch04-01-what-is-ownership.md
index aa8fc61b00..13c79b5a4b 100644
--- a/src/ch04-01-what-is-ownership.md
+++ b/src/ch04-01-what-is-ownership.md
@@ -454,6 +454,7 @@ implement `Copy`:
 - The character type, `char`.
 - Tuples, if they only contain types that also implement `Copy`. For example,
   `(i32, i32)` implements `Copy`, but `(i32, String)` does not.
+- Arrays of elements whose type implements `Copy`, such as `[f32; 4]`.
 
 ### Ownership and Functions