diff --git a/polkadot/runtime/polkadot/src/lib.rs b/polkadot/runtime/polkadot/src/lib.rs
index baef4169ea..0933801332 100644
--- a/polkadot/runtime/polkadot/src/lib.rs
+++ b/polkadot/runtime/polkadot/src/lib.rs
@@ -294,7 +294,7 @@ parameter_types! {
 	pub EpochDuration: u64 = prod_or_fast!(
 		EPOCH_DURATION_IN_SLOTS as u64,
 		2 * MINUTES as u64,
-		"KSM_EPOCH_DURATION"
+		"DOT_EPOCH_DURATION"
 	);
 	pub const ExpectedBlockTime: Moment = MILLISECS_PER_BLOCK;
 	pub ReportLongevity: u64 =