diff --git a/src/query-store.ts b/src/query-store.ts
index 8a69322..a544c5f 100644
--- a/src/query-store.ts
+++ b/src/query-store.ts
@@ -70,7 +70,8 @@ export interface UseQueryEntry<
   asyncStatus: ShallowRef<AsyncStatus>
 
   /**
-   * When was this data fetched the last time in ms
+   * When was this data set in the entry for the last time in ms. It can also
+   * be 0 if the entry has been invalidated.
    */
   when: number