diff --git a/axum/src/extract/path/mod.rs b/axum/src/extract/path/mod.rs
index 61bbef9b..856b360b 100644
--- a/axum/src/extract/path/mod.rs
+++ b/axum/src/extract/path/mod.rs
@@ -408,6 +408,7 @@ pub struct FailedToDeserializePathParams(PathDeserializationError);
 
 impl FailedToDeserializePathParams {
     /// Get a reference to the underlying error kind.
+    #[must_use]
     pub fn kind(&self) -> &ErrorKind {
         &self.0.kind
     }