diff --git a/include/rfl/flatbuf/Writer.hpp b/include/rfl/flatbuf/Writer.hpp
index 791e0acd..d4c1b2d9 100644
--- a/include/rfl/flatbuf/Writer.hpp
+++ b/include/rfl/flatbuf/Writer.hpp
@@ -24,27 +24,32 @@
 #include "../internal/is_literal.hpp"
 #include "../internal/ptr_cast.hpp"
 #include "calc_vtable_offset.hpp"
+#include "schema/Type.hpp"
 
 namespace rfl::flatbuf {
 
 class Writer {
  public:
   struct FlatbufOutputArray {
+    schema::Type::Vector* schema_;
     flatbuffers::uoffset_t offset_ = 0;
     size_t ix_ = 0;
   };
 
   struct FlatbufOutputMap {
+    schema::Type::Map* schema_;
     flatbuffers::uoffset_t offset_ = 0;
     size_t ix_ = 0;
   };
 
   struct FlatbufOutputObject {
+    schema::Type::Table* schema_;
     flatbuffers::uoffset_t offset_ = 0;
     size_t ix_ = 0;
   };
 
   struct FlatbufOutputUnion {
+    schema::Type::Table* schema_;
     flatbuffers::uoffset_t offset_ = 0;
   };