1 files changed, 7 insertions, 1 deletions
diff --git a/src/sheet/register.rs b/src/sheet/register.rs
index 82982e9..9f2493f 100644
--- a/src/sheet/register.rs
+++ b/src/sheet/register.rs
@@ -61,7 +61,13 @@ impl UserData for Register {
         });
 
         methods.add_function("open", |lua, path: String| {
-            Ok(Loader::get().load_sheet(path, lua))
+            if let Some(id) = Loader::get().load_sheet(path, lua) {
+                let luaref = SheetLuaRef::new(id);
+                if let Ok(ud) = lua.create_userdata(luaref) {
+                    return Ok(Value::UserData(ud));
+                }
+            }
+            Ok(Value::Nil)
         });
 
         methods.add_function("get", |lua, id: SheetId| {