diff --git a/wire/wl_registry.txt b/wire/wl_registry.txt
index b951da0f..64433d32 100644
--- a/wire/wl_registry.txt
+++ b/wire/wl_registry.txt
@@ -2,7 +2,7 @@ request bind {
     name: u32,
     interface: str,
     version: u32,
-    id: id(object),
+    id: id(object) (new),
 }
 
 event global {
diff --git a/xml-to-wire/src/builder.rs b/xml-to-wire/src/builder.rs
index ec7ce457..c3438bd9 100644
--- a/xml-to-wire/src/builder.rs
+++ b/xml-to-wire/src/builder.rs
@@ -90,6 +90,10 @@ fn handle_file_(path: &str) -> Result<(), BuilderError> {
                         args.next();
                         continue;
                     }
+                    if arg.ty == ArgType::NewId && arg.interface.is_none() {
+                        writeln!(file, "    interface: str,")?;
+                        writeln!(file, "    version: u32,")?;
+                    }
                     write!(file, "    {}: ", arg.name)?;
                     'ty: {
                         let ty = match arg.ty {