diff --git a/src/nostalgia/core/userland/gfx_opengl.cpp b/src/nostalgia/core/userland/gfx_opengl.cpp
index 9d1853c5..36f26a8f 100644
--- a/src/nostalgia/core/userland/gfx_opengl.cpp
+++ b/src/nostalgia/core/userland/gfx_opengl.cpp
@@ -19,13 +19,13 @@ void ImGui_Impl_NewFrame() noexcept;
 
 namespace renderer {
 
-constexpr auto TileRows = 128;
-constexpr auto TileColumns = 128;
-constexpr auto TileCount = TileRows * TileColumns;
-constexpr unsigned BgVertexVboRows = 4;
-constexpr unsigned BgVertexVboRowLength = 4;
-constexpr unsigned BgVertexVboLength = BgVertexVboRows * BgVertexVboRowLength;
-constexpr unsigned BgVertexEboLength = 6;
+constexpr uint64_t TileRows = 128;
+constexpr uint64_t TileColumns = 128;
+constexpr uint64_t TileCount = TileRows * TileColumns;
+constexpr uint64_t BgVertexVboRows = 4;
+constexpr uint64_t BgVertexVboRowLength = 4;
+constexpr uint64_t BgVertexVboLength = BgVertexVboRows * BgVertexVboRowLength;
+constexpr uint64_t BgVertexEboLength = 6;
 
 struct CBB: public glutils::BufferSet {
 	bool updated = false;
@@ -179,7 +179,8 @@ static void drawBackgrounds(GlImplData *id) noexcept {
 	for (auto &bg : id->backgrounds) {
 		if (bg.enabled) {
 			auto &cbb = id->cbbs[bg.cbbIdx];
-			glUniform1f(uniformTileHeight, 1.0f / static_cast<float>(cbb.tex.height / 8));
+			const auto tileRows = cbb.tex.height / TileHeight;
+			glUniform1f(uniformTileHeight, 1.0f / static_cast<float>(tileRows));
 			drawBackground(&cbb);
 		}
 	}