diff --git a/src/mame/drivers/nss.cpp b/src/mame/drivers/nss.cpp
index 0b7ba823977..342521c4536 100644
--- a/src/mame/drivers/nss.cpp
+++ b/src/mame/drivers/nss.cpp
@@ -867,7 +867,8 @@ void nss_state::nss(machine_config &config)
 
 	// SNES PPU
 	SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
-	m_screen->set_raw(DOTCLK_NTSC, SNES_HTOTAL, 0, SNES_SCR_WIDTH, SNES_VTOTAL_NTSC, 0, SNES_SCR_HEIGHT_NTSC);
+	m_screen->set_raw(DOTCLK_NTSC * 2, SNES_HTOTAL * 2, 0, SNES_SCR_WIDTH * 2, SNES_VTOTAL_NTSC, 0, SNES_SCR_HEIGHT_NTSC);
+	m_screen->set_video_attributes(VIDEO_VARIABLE_WIDTH);
 	m_screen->set_screen_update(FUNC(snes_state::screen_update));
 	m_screen->screen_vblank().set(FUNC(nss_state::nss_vblank_irq));
 
diff --git a/src/mame/drivers/sfcbox.cpp b/src/mame/drivers/sfcbox.cpp
index fdc7d6f0f17..ec46a34fd43 100644
--- a/src/mame/drivers/sfcbox.cpp
+++ b/src/mame/drivers/sfcbox.cpp
@@ -489,7 +489,8 @@ void sfcbox_state::sfcbox(machine_config &config)
 
 	// SNES PPU
 	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
-	screen.set_raw(DOTCLK_NTSC, SNES_HTOTAL, 0, SNES_SCR_WIDTH, SNES_VTOTAL_NTSC, 0, SNES_SCR_HEIGHT_NTSC);
+	screen.set_raw(DOTCLK_NTSC * 2, SNES_HTOTAL * 2, 0, SNES_SCR_WIDTH * 2, SNES_VTOTAL_NTSC, 0, SNES_SCR_HEIGHT_NTSC);
+	screen.set_video_attributes(VIDEO_VARIABLE_WIDTH);
 	screen.set_screen_update(FUNC(snes_state::screen_update));
 
 	SNES_PPU(config, m_ppu, MCLK_NTSC);