diff --git a/integration-tests/emulated/helpers/src/lib.rs b/integration-tests/emulated/helpers/src/lib.rs
index 5e182829fc..08bf402e9d 100644
--- a/integration-tests/emulated/helpers/src/lib.rs
+++ b/integration-tests/emulated/helpers/src/lib.rs
@@ -31,7 +31,6 @@ pub use xcm_emulator::Chain;
 /// TODO: when bumping to polkadot-sdk v1.8.0,
 /// remove this crate altogether and get the macros from `emulated-integration-tests-common`.
 /// TODO: backport this macros to polkadot-sdk
-
 #[macro_export]
 macro_rules! test_relay_is_trusted_teleporter {
 	( $sender_relay:ty, $sender_xcm_config:ty, vec![$( $receiver_para:ty ),+], ($assets:expr, $amount:expr) ) => {
diff --git a/relay/polkadot/src/coretime_migration.rs b/relay/polkadot/src/coretime_migration.rs
index 54e498e19a..9fc595031a 100644
--- a/relay/polkadot/src/coretime_migration.rs
+++ b/relay/polkadot/src/coretime_migration.rs
@@ -244,7 +244,7 @@ fn migrate_send_assignments_to_coretime_chain<
 				},
 			};
 
-			let time_slice = (valid_until + TIMESLICE_PERIOD - 1) / TIMESLICE_PERIOD;
+			let time_slice = valid_until.div_ceil(TIMESLICE_PERIOD);
 			log::trace!(target: "coretime-migration", "Sending of lease holding para {:?}, valid_until: {:?}, time_slice: {:?}", p, valid_until, time_slice);
 			Some(mk_coretime_call::<T>(CoretimeCalls::SetLease(p.into(), time_slice)))
 		});