diff --git a/src/func/instances/effect.rs b/src/func/instances/effect.rs
index 97ab7a0..d5e882c 100644
--- a/src/func/instances/effect.rs
+++ b/src/func/instances/effect.rs
@@ -3,10 +3,11 @@
 //! For "either"/"sum" wrapping, see [`result`].
 //!
 //! For no extra data, see [`solo`].
+//!
+//! [`result`]: crate::func::instances::result
+//! [`solo`]: crate::func::instances::solo
 
 use crate::func::class_prelude::*;
-#[cfg(doc)]
-use crate::func::instances::*;
 
 /// Metadata type.
 pub trait Effect {