diff --git a/contracts/multi-chains/RoninTrustedOrganization.sol b/contracts/multi-chains/RoninTrustedOrganization.sol
index cbc4ea03e..f0f18c84d 100644
--- a/contracts/multi-chains/RoninTrustedOrganization.sol
+++ b/contracts/multi-chains/RoninTrustedOrganization.sol
@@ -243,7 +243,7 @@ contract RoninTrustedOrganization is IRoninTrustedOrganization, HasProxyAdmin, H
   /**
    * @inheritdoc IRoninTrustedOrganization
    */
-  function getTrustedOrganization(TConsensus _consensusAddr) external view returns (TrustedOrganization memory) {
+  function getTrustedOrganization(TConsensus _consensusAddr) external view returns (TrustedOrganization memory trustedOrg) {
     for (uint i = 0; i < _consensusList.length; ++i) {
       if (_consensusList[i] == _consensusAddr) {
         return getTrustedOrganizationAt(i);
diff --git a/contracts/ronin/profile/ProfileHandler.sol b/contracts/ronin/profile/ProfileHandler.sol
index 5dc7a3e12..d7e49288b 100644
--- a/contracts/ronin/profile/ProfileHandler.sol
+++ b/contracts/ronin/profile/ProfileHandler.sol
@@ -24,22 +24,22 @@ abstract contract ProfileHandler is ProfileStorage {
   }
 
   function _requireNonDuplicated(RoleAccess addressType, address addr) internal view {
-    if (_checkNonDuplicatedAddr(addr)) {
+    if (_isRegisteredAddr(addr)) {
       revert ErrDuplicatedInfo(addressType, uint256(uint160(addr)));
     }
   }
 
-  function _checkNonDuplicatedAddr(address addr) internal view returns (bool) {
+  function _isRegisteredAddr(address addr) internal view returns (bool) {
     return _registry[uint256(uint160(addr))];
   }
 
   function _requireNonDuplicatedPubkey(bytes memory pubkey) internal view {
-    if (_checkNonDuplicatedPubkey(pubkey)) {
+    if (_isRegisteredPubkey(pubkey)) {
       revert ErrDuplicatedPubkey(pubkey);
     }
   }
 
-  function _checkNonDuplicatedPubkey(bytes memory pubkey) internal view returns (bool) {
+  function _isRegisteredPubkey(bytes memory pubkey) internal view returns (bool) {
     return _registry[_hashPubkey(pubkey)];
   }
 }