diff --git a/wallet/v1/internal_srv.proto b/wallet/v1/internal_srv.proto
index 7869097..91c88ef 100644
--- a/wallet/v1/internal_srv.proto
+++ b/wallet/v1/internal_srv.proto
@@ -13,7 +13,7 @@ service InternalWalletSrv {
   rpc ReleaseAsset(LockAssetReq) returns (base.v1.StatusRes);
 
   rpc CollectCommission(CommissionReq) returns (CommissionRes);
-  rpc RefundCommission(CommissionReq) returns (CommissionRes);
+  rpc RefundCommission(RefundCommissionReq) returns (CommissionRes);
 
   // Calculate stellar pub-priv key based on national id
   rpc GetPublicKeyByNationalID(NationalIDReq) returns (PubKeyRes);