diff --git a/README.md b/README.md
index dc4793a..9fc86a0 100644
--- a/README.md
+++ b/README.md
@@ -256,7 +256,7 @@ interface IWormholeReceiver {
         bytes[] memory additionalVaas,
         bytes32 sourceAddress,
         uint16 sourceChain,
-        bytes32 deliveryHash
+        bytes32 delivery hash
     ) external payable;
 }
 ```