diff --git a/content/md/en/docs/tutorials/build-application-logic/use-macros-in-a-custom-pallet.md b/content/md/en/docs/tutorials/build-application-logic/use-macros-in-a-custom-pallet.md
index c6aa96a7a..b8e13dcb9 100644
--- a/content/md/en/docs/tutorials/build-application-logic/use-macros-in-a-custom-pallet.md
+++ b/content/md/en/docs/tutorials/build-application-logic/use-macros-in-a-custom-pallet.md
@@ -238,7 +238,9 @@ To implement storage for the proof-of-existence pallet:
 
    ```rust
    #[pallet::storage]
-   pub(super) type Claims<T: Config> = StorageMap<_, Blake2_128Concat, T::Hash, (T::AccountId, T::BlockNumber)>;
+   pub(super) type Claims<T: Config> = StorageMap<_, Blake2_128Concat, T::Hash, (T::AccountId, BlockNumberFor<T>)>;
+    #[pallet::hooks]
+    impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {}
    ```
 
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