diff --git a/documentation/book/src/primitive-types/integers.md b/documentation/book/src/primitive-types/integers.md
index cd25408248..b431d99869 100644
--- a/documentation/book/src/primitive-types/integers.md
+++ b/documentation/book/src/primitive-types/integers.md
@@ -157,7 +157,7 @@ Casts _do not_ truncate. Casting aborts if the result is too large for the speci
 | ---------- | ---------------------------------------------------- | -------------------------------------- |
 | `(e as T)` | Cast integer expression `e` into an integer type `T` | `e` is too large to represent as a `T` |
 
-Here, the type of `e` must be `8`, `16`, `32`, `64`, `128` or `256` and `T` must be `u8`, `u16`,
+Here, the type of `e` must be `u8`, `u16`, `u32`, `u64`, `u128` or `u256` and `T` must be `u8`, `u16`,
 `u32`, `u64`, `u128`, or `u256`.
 
 For example: