diff --git a/contracts/connectors/1inch.sol b/contracts/connectors/1inch.sol
index dcfd1ee..18a1af4 100644
--- a/contracts/connectors/1inch.sol
+++ b/contracts/connectors/1inch.sol
@@ -74,7 +74,7 @@ contract OneHelpers is Stores, DSMath {
     /**
      * @dev Return 1proto Address
      */
-    function getOneProtoAddress() virtual internal view returns (address payable) {
+    function getOneProtoAddress() internal virtual view returns (address payable) {
         return payable(OneProtoMappingInterface(getOneProtoMappingAddress()).oneProtoAddress());
     }
 
diff --git a/contracts/mapping/staking.sol b/contracts/mapping/staking.sol
index 94419b4..e111481 100644
--- a/contracts/mapping/staking.sol
+++ b/contracts/mapping/staking.sol
@@ -82,6 +82,7 @@ contract Helpers is BytesHelper {
   ) public isChief {
     require(stakingAddress != address(0), "stakingAddress-not-vaild");
     require(stakingToken != address(0), "stakingToken-not-vaild");
+    require(rewardToken != address(0), "rewardToken-not-vaild");
     require(bytes(stakingName).length <= 32, "Length-exceeds");
     bytes32 stakeType = stringToBytes32(stakingName);
     require(stakingMapping[stakeType].stakingPool == address(0), "StakingPool-already-added");