diff --git a/authenticationsystem.capnp b/authenticationsystem.capnp
index bd05dac..facfee8 100644
--- a/authenticationsystem.capnp
+++ b/authenticationsystem.capnp
@@ -28,7 +28,7 @@ struct Response {
         # a human-readable error message.
     }
     union {
-        error :group {
+        failed :group {
             code @0 :Error;
             # Error code indicating the cause of the error