diff --git a/src/immutable_string.rs b/src/immutable_string.rs
index 1b4cd660..30a72a3d 100644
--- a/src/immutable_string.rs
+++ b/src/immutable_string.rs
@@ -16,8 +16,8 @@ use std::{
 
 /// The system immutable string type.
 ///
-/// An [`ImmutableString`] wraps an [`Rc`][std::rc::Rc]`<`[`String`]`>`
-///  (or [`Arc`][std::sync::Arc]`<`[`String`]`>` under the `sync` feature)
+/// An [`ImmutableString`] wraps an [`Rc`][std::rc::Rc]`<`[`SmartString`][smartstring::SmartString]`>`
+///  (or [`Arc`][std::sync::Arc]`<`[`SmartString`][smartstring::SmartString]`>` under the `sync` feature)
 /// so that it can be simply shared and not cloned.
 ///
 /// # Example