diff --git a/src/rstd/cast.rs b/src/rstd/cast.rs
index 42fd8fc..f044570 100644
--- a/src/rstd/cast.rs
+++ b/src/rstd/cast.rs
@@ -1,7 +1,9 @@
-//! Utilities to convert from typeless instances defined in [`crate::rcore`].
+//! Utilities to convert from typeless instances defined in [`rcore`].
 //! See [`TypelessMentionable::cast`]/[`Point::cast`].
 //!
 //! p.s. the implementation is horrific.
+//! 
+//! [`rcore`]: crate::rcore
 
 use std::convert::identity;