diff --git a/crates/luaffi/src/internal.rs b/crates/luaffi/src/internal.rs
index b8cce11..70e5cae 100644
--- a/crates/luaffi/src/internal.rs
+++ b/crates/luaffi/src/internal.rs
@@ -9,12 +9,12 @@ use std::{
 #[allow(non_camel_case_types)]
 pub mod stub_types {
     pub struct any;
-    pub struct nil;
-    pub struct boolean;
-    pub struct lightuserdata;
-    pub struct number;
-    pub struct integer;
-    pub struct string;
+    pub type nil = ();
+    pub type boolean = bool;
+    pub type lightuserdata = *mut ();
+    pub type number = f64;
+    pub type integer = i64;
+    pub type string = &'static str;
     pub struct table;
     pub struct function;
     pub struct userdata;