diff --git a/contracts/interfaces/V3SpokePoolInterface.sol b/contracts/interfaces/V3SpokePoolInterface.sol
index 331fc23b4..b37623bea 100644
--- a/contracts/interfaces/V3SpokePoolInterface.sol
+++ b/contracts/interfaces/V3SpokePoolInterface.sol
@@ -109,6 +109,15 @@ interface V3SpokePoolInterface {
         FillType fillType;
     }
 
+    // Same as V3RelayExecutionEventInfo but using addresses instead of bytes32. Currently retained for historical
+    // reference. Will be deprecated in favor of V3RelayExecutionEventInfo in the future.
+    struct V3RelayExecutionEventInfoLegacy {
+        address updatedRecipient;
+        address updatedMessageHash;
+        uint256 updatedOutputAmount;
+        FillType fillType;
+    }
+
     // Represents the parameters required for a V3 deposit operation in the SpokePool.
     struct DepositV3Params {
         bytes32 depositor;
@@ -388,7 +397,7 @@ interface V3SpokePoolInterface {
         address depositor,
         address recipient,
         bytes message,
-        V3RelayExecutionEventInfo relayExecutionInfo
+        V3RelayExecutionEventInfoLegacy relayExecutionInfo
     );
 
     event RequestedV3SlowFill(