diff --git a/contracts/system-contracts/HederaResponseCodes.sol b/contracts/system-contracts/HederaResponseCodes.sol
index a3da3259c..bc9134ec4 100644
--- a/contracts/system-contracts/HederaResponseCodes.sol
+++ b/contracts/system-contracts/HederaResponseCodes.sol
@@ -1041,4 +1041,7 @@ library HederaResponseCodes {
     // The provided max custom fee list contains fees with duplicate account id.
     int32 internal constant DUPLICATE_ACCOUNT_ID_IN_MAX_CUSTOM_FEE_LIST = 386;
 
+    // Max custom fees list is not supported for this operation.
+    int32 internal constant MAX_CUSTOM_FEES_IS_NOT_SUPPORTED = 387;
+
 }