diff --git a/api.capnp b/api.capnp
index b890575..5d0c0ff 100644
--- a/api.capnp
+++ b/api.capnp
@@ -34,7 +34,7 @@ interface Machines {
     listMachines @0 () -> ( machines :List(Machine) );
     # List all machines that BFFH knows about the user has been granted at least read access on
 
-    getMachine @1 ( uuid :UUID ) -> ( machine :Machine, dummy :UInt8 = 0 );
+    getMachine @1 ( uid :Text ) -> ( machine :Machine, dummy :UInt8 = 0 );
     # Access a particular machine by known UUID. This may fail for two reasons: The user
     # has not been granted access to know the machine exists or the machine does in fact
     # not exist. In both cases the `machine` result will be a NULL-pointer