diff --git a/usersystem.capnp b/usersystem.capnp
index ca9ff69..140683a 100644
--- a/usersystem.capnp
+++ b/usersystem.capnp
@@ -33,7 +33,7 @@ struct UserSystem
     	removeUser @2 (user: User);
 
         struct AddUserError {
-            enum AddUserError {
+            enum AddUserError $CSharp.name("AddUserErrorEnum") {
                 alreadyExists @0;
                 # An user with that username already exists