diff --git a/polkadot/runtime/common/src/auctions.rs b/polkadot/runtime/common/src/auctions.rs
index 3e9a5e0b5c..caa609e1af 100644
--- a/polkadot/runtime/common/src/auctions.rs
+++ b/polkadot/runtime/common/src/auctions.rs
@@ -605,7 +605,7 @@ impl<T: Config> Pallet<T> {
 					.map(|(_, _, amount)| *amount * (range.len() as u32).into())
 			};
 			for i in 0..SlotRange::LEASE_PERIODS_PER_SLOT {
-				let r = SlotRange::new_bounded(0, 0, i as u32).expect("`i < 4`; qed");
+				let r = SlotRange::new_bounded(0, 0, i as u32).expect("`i < LPPS`; qed");
 				if let Some(bid) = best_bid(r) {
 					best_winners_ending_at[i] = (vec![r], bid);
 				}