diff --git a/src/repository.ts b/src/repository.ts
index 30bca16..51114b4 100644
--- a/src/repository.ts
+++ b/src/repository.ts
@@ -50,6 +50,8 @@ export interface IOrderedStop {
 /**
  * Repository interface for data derived from Passio API.
  * The repository is not designed to have write locks in place.
+ * Objects passed from/to the repository should be treated
+ * as disposable.
  */
 export interface Repository {
   // Getter methods
@@ -92,6 +94,6 @@ export interface Repository {
   addOrUpdateRoute(route: IRoute): Promise<void>;
   addOrUpdateShuttle(shuttle: IShuttle): Promise<void>;
   addOrUpdateStop(stop: IStop): Promise<void>;
-  addOrUpdateOrderedStop(orderedStop: IStop): Promise<void>;
+  addOrUpdateOrderedStop(orderedStop: IOrderedStop): Promise<void>;
   addOrUpdateEta(eta: IEta): Promise<void>;
 }
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