diff --git a/src/nostalgia/core/opengl/gfx.cpp b/src/nostalgia/core/opengl/gfx.cpp
index ba6b0201..7de68842 100644
--- a/src/nostalgia/core/opengl/gfx.cpp
+++ b/src/nostalgia/core/opengl/gfx.cpp
@@ -421,7 +421,7 @@ uint8_t bgStatus(Context *ctx) noexcept {
 	const auto &gctx = static_cast<GlContext&>(*ctx);
 	uint8_t out = 0;
 	for (unsigned i = 0; i < gctx.cbbs.size(); ++i) {
-		out |= gctx.backgrounds[i].enabled << i;
+		out |= static_cast<uint8_t>(static_cast<unsigned>(gctx.backgrounds[i].enabled) << i);
 	}
 	return out;
 }
@@ -558,4 +558,4 @@ void drawMainView(core::Context *ctx, ox::Size const&renderSz) noexcept {
 
 }
 
-}
\ No newline at end of file
+}