diff --git a/src/nostalgia/modules/core/src/gba/gfx.cpp b/src/nostalgia/modules/core/src/gba/gfx.cpp
index 59e25287..3d58ce57 100644
--- a/src/nostalgia/modules/core/src/gba/gfx.cpp
+++ b/src/nostalgia/modules/core/src/gba/gfx.cpp
@@ -99,10 +99,10 @@ ox::Error loadBgTileSheet(
 		size_t const tileCnt) noexcept {
 	size_t const bppMod = ts.bpp == 4;
 	size_t const bytesPerTile = PixelsPerTile >> bppMod;
-	auto const pixCnt = tileCnt * bytesPerTile;
+	auto const cnt = (tileCnt * bytesPerTile) / 2;
 	auto const srcPxIdx = srcTileIdx * bytesPerTile;
 	auto const dstPxIdx = (dstTileIdx * bytesPerTile) / 2;
-	for (size_t i = 0; i < pixCnt; ++i) {
+	for (size_t i = 0; i < cnt; ++i) {
 		auto const srcIdx = srcPxIdx + i * 2;
 		auto const p1 = static_cast<uint16_t>(ts.pixels[srcIdx]);
 		auto const p2 = static_cast<uint16_t>(ts.pixels[srcIdx + 1]);