diff --git a/sdk-builder/src/main.rs b/sdk-builder/src/main.rs
index b372a45..9a37561 100644
--- a/sdk-builder/src/main.rs
+++ b/sdk-builder/src/main.rs
@@ -590,14 +590,16 @@ pub mod rust {
         fn generate_struct_ctor(
             &self,
             _class: &Class,
-            _name: &str,
+            type_name: &str,
             fields: &Vec<(&ClassField, Cow<str>, String)>,
         ) -> TokenStream {
             let fields_defs = fields.iter().map(|(_, name, ty)| quote! {#name: #ty});
 
             let this_field_asignments = fields.iter().map(|(_, name, _ty)| {
                 let setter = format_ident!("set_{}", name);
-                quote! {this.#setter(#name);}
+                let field_trait = format_ident!("{type_name}Fields");
+
+                quote! {<Self as #field_trait>::#setter(this, #name);}
             });
 
             // FIXME: handle super struct fields aswell, ARK doesnt seem to have those anyways.
@@ -696,8 +698,6 @@ pub mod rust {
                 impl #method_trait for #name {}
             };
 
-            // TODO: impl super-type fields and methods.
-
             let mut sup = class.super_class;
             let super_traits = core::iter::from_fn(|| {
                 if let Some(key) = sup {