diff --git a/crates/dagger-codegen/src/lib.rs b/crates/dagger-codegen/src/lib.rs
index 7d89de1..cc233b1 100644
--- a/crates/dagger-codegen/src/lib.rs
+++ b/crates/dagger-codegen/src/lib.rs
@@ -13,7 +13,7 @@ use self::generator::DynGenerator;
 fn set_schema_parents(mut schema: Schema) -> Schema {
     for t in schema.types.as_mut().into_iter().flatten().flatten() {
         let t_parent = t.full_type.clone();
-        for mut field in t.full_type.fields.as_mut().into_iter().flatten() {
+        for field in t.full_type.fields.as_mut().into_iter().flatten() {
             field.parent_type = Some(t_parent.clone());
         }
     }