diff --git a/src/ox/model/desctypes.hpp b/src/ox/model/desctypes.hpp
index f8ba8eaf8..033059ee5 100644
--- a/src/ox/model/desctypes.hpp
+++ b/src/ox/model/desctypes.hpp
@@ -27,7 +27,7 @@ using FieldName = String;
 using TypeParamPack = Vector<String>;
 
 static constexpr auto buildTypeId(CRStringView name, int version,
-                                  const TypeParamPack &typeParams) noexcept {
+                                  const TypeParamPack &typeParams = {}) noexcept {
 	String tp;
 	if (typeParams.size()) {
 		tp = "#";