diff --git a/src/rstd/atomic.rs b/src/rstd/atomic.rs
index cd4a181..118ffc0 100644
--- a/src/rstd/atomic.rs
+++ b/src/rstd/atomic.rs
@@ -19,6 +19,7 @@ pub use self::modes::{
     CRegularAtomic, RegularAtomic,
 };
 
+/// [`Atomic`] equivalent of [`ParseError`].
 pub type AParseError<A> = <A as AtomicBase>::AParseError;
 
 pub type AParseResult<A> = Result<A, AParseError<A>>;