diff --git a/src/nostalgia/modules/core/src/gba/gfx.cpp b/src/nostalgia/modules/core/src/gba/gfx.cpp
index aade7c37..39530f60 100644
--- a/src/nostalgia/modules/core/src/gba/gfx.cpp
+++ b/src/nostalgia/modules/core/src/gba/gfx.cpp
@@ -311,6 +311,11 @@ void setBgStatus(Context&, unsigned bg, bool status) noexcept {
 	REG_DISPCTL = REG_DISPCTL | ((REG_DISPCTL & ~mask) | mask);
 }
 
+void setBgBpp(Context&, unsigned bgIdx, unsigned bpp) noexcept {
+	auto &bgCtl = regBgCtl(bgIdx);
+	teagba::bgSetBpp(bgCtl, bpp);
+}
+
 void setBgCbb(Context &ctx, unsigned bgIdx, unsigned cbb) noexcept {
 	auto &bgCtl = regBgCtl(bgIdx);
 	const auto &cbbData = ctx.cbbData[cbb];
diff --git a/src/nostalgia/modules/core/src/opengl/gfx.cpp b/src/nostalgia/modules/core/src/opengl/gfx.cpp
index 57d9100e..188251a3 100644
--- a/src/nostalgia/modules/core/src/opengl/gfx.cpp
+++ b/src/nostalgia/modules/core/src/opengl/gfx.cpp
@@ -628,10 +628,12 @@ bool bgStatus(Context &ctx, uint_t bg) noexcept {
 	return ctx.backgrounds[bg].enabled;
 }
 
-void setBgStatus(Context &ctx, uint_t bg, bool status) noexcept {
+void setBgStatus(Context&ctx, uint_t bg, bool status) noexcept {
 	ctx.backgrounds[bg].enabled = status;
 }
 
+void setBgBpp(Context&, unsigned, unsigned) noexcept {}
+
 void setBgCbb(Context &ctx, uint_t bgIdx, uint_t cbbIdx) noexcept {
 	auto &bg = ctx.backgrounds[bgIdx];
 	bg.cbbIdx = cbbIdx;