diff --git a/src/storage.ts b/src/storage.ts
index d53c755d..f9484116 100644
--- a/src/storage.ts
+++ b/src/storage.ts
@@ -69,13 +69,15 @@ export function createStorage<T extends StorageValue>(
       }));
   };
 
-  const onChange: WatchCallback = (event, key) => {
+  const onChange: WatchCallback = (event, resource) => {
     if (!context.watching) {
       return;
     }
-    key = normalizeKey(key);
+    resource = normalizeKey(
+      typeof resource === "string" ? resource : resource.key
+    );
     for (const listener of context.watchListeners) {
-      listener(event, key);
+      listener(event, resource);
     }
   };
 
diff --git a/src/types.ts b/src/types.ts
index e33a8da5..1a276371 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,6 +1,9 @@
 export type StorageValue = null | string | number | boolean | object;
 export type WatchEvent = "update" | "remove";
-export type WatchCallback = (event: WatchEvent, key: string) => any;
+export type WatchCallback = (
+  event: WatchEvent,
+  resource: string | (Record<string, any> & { key: string })
+) => any;
 
 type MaybePromise<T> = T | Promise<T>;