diff --git a/prt/contracts/src/ITournament.sol b/prt/contracts/src/ITournament.sol
index 9593ed5e..8370073c 100644
--- a/prt/contracts/src/ITournament.sol
+++ b/prt/contracts/src/ITournament.sol
@@ -10,5 +10,9 @@ interface ITournament {
     function arbitrationResult()
         external
         view
-        returns (bool, Tree.Node, Machine.Hash);
+        returns (
+            bool isFinished,
+            Tree.Node winningCommitment,
+            Machine.Hash finalMachineStateHash
+        );
 }