diff --git a/content/md/en/docs/reference/how-to-guides/pallet-design/incorporate-randomness.md b/content/md/en/docs/reference/how-to-guides/pallet-design/incorporate-randomness.md
index c3d476cf1..d63ead82b 100644
--- a/content/md/en/docs/reference/how-to-guides/pallet-design/incorporate-randomness.md
+++ b/content/md/en/docs/reference/how-to-guides/pallet-design/incorporate-randomness.md
@@ -30,7 +30,7 @@ The guide also illustrates how to add entropy to the randomness value by assigni
    ```rust
    #[pallet::config]
    pub trait frame_system::Config {
-   	type MyRandomness: Randomness<Self::Hash, Self::BlockNumber>;
+   	type MyRandomness: Randomness<Self::Hash, BlockNumberFor<Self>>;
    }
    ```