diff --git a/src/rcore/resolution.rs b/src/rcore/resolution.rs
index 733f35b..f4de099 100644
--- a/src/rcore/resolution.rs
+++ b/src/rcore/resolution.rs
@@ -10,6 +10,7 @@ pub enum ResolutionError<L, P> {
 }
 
 impl<L, P> ResolutionError<L, P> {
+    /// Maps only the [`ResolutionError::Parse`] variant of the overall error.
     pub fn map_parse<Px>(self, f: impl FnOnce(P) -> Px) -> ResolutionError<L, Px> {
         match self {
             Self::Lookup(l) => ResolutionError::Lookup(l),