diff --git a/authenticationsystem.capnp b/authenticationsystem.capnp
index facfee8..16d19a5 100644
--- a/authenticationsystem.capnp
+++ b/authenticationsystem.capnp
@@ -61,11 +61,11 @@ struct Response {
 }
 
 interface Authentication {
-    step @0 ( data: Data ) -> ( response: Response );
+    step @0 ( data: Data ) -> Response;
     # Respond to a challenge with more data. A client MUST NOT call this after having received an
     # "successful" response.
 
-    abort @1 () -> ();
+    abort @1 ();
     # Abort the current exchange. This will invalidate the Authentication making all further calls
     # to `step` return an error response. A client MUST NOT call this function after
     # having received an "successful" response.
diff --git a/connection.capnp b/connection.capnp
index a21bf5a..6ed2562 100644
--- a/connection.capnp
+++ b/connection.capnp
@@ -24,7 +24,7 @@ struct Version
 
 interface Bootstrap 
 {
-    getAPIVersion @0 () -> ( version : Version );
+    getAPIVersion @0 () -> Version;
 
     getServerRelease @1 () -> ( name :Text, release :Text );
     # Returns the server implementation name and version/build number
diff --git a/machine.capnp b/machine.capnp
index 08989d3..e40e201 100644
--- a/machine.capnp
+++ b/machine.capnp
@@ -78,7 +78,7 @@ struct Machine {
 
     manage @11 :Manage;
     interface Manage $CSharp.name("ManageInterface") {
-        getMachineInfoExtended @0 () -> ( machineInfoExtended :MachineInfoExtended, dummy :UInt8 = 0);
+        getMachineInfoExtended @0 () -> MachineInfoExtended;
         
         setProperty @1 (property :General.KeyValuePair);
         removeProperty @2 (property :General.KeyValuePair);
diff --git a/machinesystem.capnp b/machinesystem.capnp
index 331e5eb..473fa53 100644
--- a/machinesystem.capnp
+++ b/machinesystem.capnp
@@ -15,7 +15,7 @@ interface MachineSystem
     interface Info $CSharp.name("InfoInterface") {
     	getMachineList @0 () -> ( machine_list :List(Machine) );
 
-    	getMachine @1 ( id :Text ) -> ( machine :Machine, dummy :UInt8 = 0 );
-		getMachineURN @2 ( urn :Text ) -> ( machine :Machine, dummy :UInt8 = 0 );
+    	getMachine @1 ( id :Text ) -> Machine;
+		getMachineURN @2 ( urn :Text ) -> Machine;
 	}
 }