diff --git a/runtime/crab/src/migration.rs b/runtime/crab/src/migration.rs
index 459606f27..e4e8edc6f 100644
--- a/runtime/crab/src/migration.rs
+++ b/runtime/crab/src/migration.rs
@@ -50,7 +50,7 @@ fn migrate() -> frame_support::weights::Weight {
 	#[cfg(feature = "try-runtime")]
 	assert!(array_bytes::hex_n_into::<_, _, 20>(KTON_DAO_VAULT_ADDR).is_ok());
 
-	if let Some(w) = array_bytes::hex_n_into::<_, _, 20>(KTON_DAO_VAULT_ADDR) {
+	if let Ok(w) = array_bytes::hex_n_into::<_, _, 20>(KTON_DAO_VAULT_ADDR) {
 		<darwinia_staking::KtonRewardDistributionContract<Runtime>>::put(w);
 		darwinia_staking::migration::migrate_staking_reward_distribution_contract::<Runtime>(w);
 	}
diff --git a/runtime/darwinia/src/migration.rs b/runtime/darwinia/src/migration.rs
index aacee02a2..01249412a 100644
--- a/runtime/darwinia/src/migration.rs
+++ b/runtime/darwinia/src/migration.rs
@@ -66,7 +66,7 @@ fn migrate() -> frame_support::weights::Weight {
 	#[cfg(feature = "try-runtime")]
 	assert!(array_bytes::hex_n_into::<_, _, 20>(KTON_DAO_VAULT_ADDR).is_ok());
 
-	if let Some(w) = array_bytes::hex_n_into::<_, _, 20>(KTON_DAO_VAULT_ADDR) {
+	if let Ok(w) = array_bytes::hex_n_into::<_, _, 20>(KTON_DAO_VAULT_ADDR) {
 		<darwinia_staking::KtonRewardDistributionContract<Runtime>>::put(w);
 		darwinia_staking::migration::migrate_staking_reward_distribution_contract::<Runtime>(w);
 	}