diff --git a/hiro.proto b/hiro.proto
index 15179fc..3a68f4a 100644
--- a/hiro.proto
+++ b/hiro.proto
@@ -1252,7 +1252,7 @@ message InventoryConsumeRewards {
 
 // Response from granting or purchasing items. This contains updated inventory data, if changed.
 message InventoryUpdateAck {
-  // Update inventory data, if changed.
+  // Updated inventory data, if changed.
   Inventory inventory = 1;
 }