diff --git a/src/rendering/twn_draw_c.h b/src/rendering/twn_draw_c.h
index 55a5e43..5dbe4c9 100644
--- a/src/rendering/twn_draw_c.h
+++ b/src/rendering/twn_draw_c.h
@@ -111,6 +111,7 @@ typedef struct MeshBatch {
     uint8_t *primitives;
 } MeshBatch;
 
+/* TODO: use atlas id instead */
 typedef struct MeshBatchItem {
     TextureKey key;
     struct MeshBatch value;