diff --git a/src/interfaces/IIncentivizedMessageEscrow.sol b/src/interfaces/IIncentivizedMessageEscrow.sol
index 494ff1e..c84a10c 100644
--- a/src/interfaces/IIncentivizedMessageEscrow.sol
+++ b/src/interfaces/IIncentivizedMessageEscrow.sol
@@ -29,14 +29,13 @@ interface IIncentivizedMessageEscrow is IMessageEscrowStructs, IMessageEscrowErr
     function processPacket(bytes calldata messagingProtocolContext, bytes calldata message, bytes32 feeRecipient) payable external;
 
     function setRemoteImplementation(bytes32 chainIdentifier, bytes calldata implementation) external;
-    
+
     /**
      * @notice Estimates the additional cost to the messaging router to validate the message
-     * @param destinationChainIdentifier Destination chain. Some messaging protocols have chain based costs.
      * @return asset The asset the token is in. If native token, returns address(0);
      * @return amount The number of assets to pay.
      */
-    function estimateAdditionalCost(bytes32 destinationChainIdentifier) external view returns(address asset, uint256 amount);
+    function estimateAdditionalCost() external view returns(address asset, uint256 amount);
 
     function timeoutMessage(
         bytes32 sourceIdentifier,