diff --git a/frame/election-provider-support/src/lib.rs b/frame/election-provider-support/src/lib.rs
index eee865d0b737b..f95def2b5ceaf 100644
--- a/frame/election-provider-support/src/lib.rs
+++ b/frame/election-provider-support/src/lib.rs
@@ -519,9 +519,7 @@ pub trait SortedListProvider<AccountId> {
 	/// If `who` changes by the returned amount they are guaranteed to have a worst case change
 	/// in their list position.
 	#[cfg(feature = "runtime-benchmarks")]
-	fn score_update_worst_case(_who: &AccountId, _is_increase: bool) -> Self::Score {
-		Self::Score::max_value()
-	}
+	fn score_update_worst_case(_who: &AccountId, _is_increase: bool) -> Self::Score;
 }
 
 /// Something that can provide the `Score` of an account. Similar to [`ElectionProvider`] and
diff --git a/frame/staking/src/pallet/impls.rs b/frame/staking/src/pallet/impls.rs
index 68aa97db8a324..fb772c8099b33 100644
--- a/frame/staking/src/pallet/impls.rs
+++ b/frame/staking/src/pallet/impls.rs
@@ -1381,6 +1381,11 @@ impl<T: Config> SortedListProvider<T::AccountId> for UseNominatorsAndValidatorsM
 		#[allow(deprecated)]
 		Validators::<T>::remove_all();
 	}
+
+	#[cfg(feature = "runtime-benchmarks")]
+	fn score_update_worst_case(_who: &T::AccountId, _is_increase: bool) -> Self::Score {
+		unimplemented!();
+	}
 }
 
 impl<T: Config> StakingInterface for Pallet<T> {