diff --git a/src/mame/drivers/tmnt.cpp b/src/mame/drivers/tmnt.cpp
index b020c236603..727e3241419 100644
--- a/src/mame/drivers/tmnt.cpp
+++ b/src/mame/drivers/tmnt.cpp
@@ -2541,6 +2541,8 @@ void tmnt_state::sunsetbl(machine_config &config)
 	m_palette->enable_shadows();
 	m_palette->enable_hilights();
 
+	MCFG_VIDEO_START_OVERRIDE(tmnt_state,lgtnfght)
+
 	K052109(config, m_k052109, 0);
 	m_k052109->set_palette(m_palette);
 	m_k052109->set_screen(nullptr);
diff --git a/src/mame/video/taito_f3.cpp b/src/mame/video/taito_f3.cpp
index 9656f15d1f1..5349f4bbe01 100644
--- a/src/mame/video/taito_f3.cpp
+++ b/src/mame/video/taito_f3.cpp
@@ -502,6 +502,7 @@ void taito_f3_state::video_start()
 		m_tilemap[1] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(taito_f3_state::get_tile_info<1>)), TILEMAP_SCAN_ROWS, 16, 16, 64, 32);
 		m_tilemap[2] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(taito_f3_state::get_tile_info<2>)), TILEMAP_SCAN_ROWS, 16, 16, 64, 32);
 		m_tilemap[3] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(taito_f3_state::get_tile_info<3>)), TILEMAP_SCAN_ROWS, 16, 16, 64, 32);
+		m_tilemap[4] = m_tilemap[5] = m_tilemap[6] = m_tilemap[7] = nullptr;
 
 		m_pf_data[0] = m_pf_ram + (0x0000 / 2);
 		m_pf_data[1] = m_pf_ram + (0x2000 / 2);