diff --git a/src/nostalgia/modules/core/include/nostalgia/core/tilesheet.hpp b/src/nostalgia/modules/core/include/nostalgia/core/tilesheet.hpp
index 06beb9c5..3de737d1 100644
--- a/src/nostalgia/modules/core/include/nostalgia/core/tilesheet.hpp
+++ b/src/nostalgia/modules/core/include/nostalgia/core/tilesheet.hpp
@@ -159,7 +159,10 @@ struct TileSheet {
 std::size_t idx(TileSheet::SubSheet const&ss, ox::Point const&pt) noexcept;
 
 [[nodiscard]]
-TileSheet::SubSheet const*getSubsheet(TileSheet const&ts, SubSheetId const id) noexcept;
+size_t getTileCnt(TileSheet const&ts) noexcept;
+
+[[nodiscard]]
+TileSheet::SubSheet const*getSubsheet(TileSheet const&ts, SubSheetId id) noexcept;
 
 [[nodiscard]]
 size_t getTileIdx(TileSheet const&ts, SubSheetId id) noexcept;