diff --git a/deps/nostalgia/src/nostalgia/modules/gfx/include/nostalgia/gfx/consts.hpp b/deps/nostalgia/src/nostalgia/modules/gfx/include/nostalgia/gfx/consts.hpp
index 95799f7..9b781ef 100644
--- a/deps/nostalgia/src/nostalgia/modules/gfx/include/nostalgia/gfx/consts.hpp
+++ b/deps/nostalgia/src/nostalgia/modules/gfx/include/nostalgia/gfx/consts.hpp
@@ -12,8 +12,13 @@ constexpr auto TileWidth = 8;
 constexpr auto TileHeight = 8;
 constexpr auto PixelsPerTile = TileWidth * TileHeight;
 
-constexpr ox::StringLiteral FileExt_ng("ng");
-constexpr ox::StringLiteral FileExt_nts("nts");
-constexpr ox::StringLiteral FileExt_npal("npal");
+constexpr ox::StringLiteral FileExt_ng{"ng"};
+constexpr ox::StringLiteral FileExt_nts{"nts"};
+constexpr ox::StringLiteral FileExt_npal{"npal"};
+
+[[nodiscard]]
+constexpr bool isTileSheet(ox::StringViewCR path) noexcept {
+	return endsWith(path, FileExt_nts) || endsWith(path, FileExt_ng);
+}
 
 }