diff --git a/src/olympic/keel/include/keel/module.hpp b/src/olympic/keel/include/keel/module.hpp
index 13de7f1e..6d17a1bf 100644
--- a/src/olympic/keel/include/keel/module.hpp
+++ b/src/olympic/keel/include/keel/module.hpp
@@ -15,7 +15,7 @@ using TypeDescGenerator = ox::Error(*)(ox::TypeStore&);
 
 template<typename T>
 ox::Error generateTypeDesc(ox::TypeStore &ts) noexcept {
-	return ox::buildTypeDef<T>(&ts).error;
+	return ox::buildTypeDef<T>(ts).error;
 }
 
 class Module {
diff --git a/src/olympic/studio/modlib/include/studio/project.hpp b/src/olympic/studio/modlib/include/studio/project.hpp
index 256b64fb..140cb9ee 100644
--- a/src/olympic/studio/modlib/include/studio/project.hpp
+++ b/src/olympic/studio/modlib/include/studio/project.hpp
@@ -136,7 +136,7 @@ ox::Error Project::writeObj(ox::StringViewCR path, T const&obj, ox::ClawFormat f
 	oxReturnError(writeBuff(path, ox::BufferView{buff} + (fmt == ox::ClawFormat::Organic)));
 	// write type descriptor
 	if (m_typeStore.get<T>().error) {
-		oxReturnError(ox::buildTypeDef(&m_typeStore, &obj));
+		oxReturnError(ox::buildTypeDef(m_typeStore, obj));
 	}
 	oxRequire(desc, m_typeStore.get<T>());
 	auto const descPath = ox::sfmt("{}/{}", m_typeDescPath, buildTypeId(*desc));