diff --git a/src/mame/drivers/portrait.cpp b/src/mame/drivers/portrait.cpp
index 0317c520079..11e2dd93c39 100644
--- a/src/mame/drivers/portrait.cpp
+++ b/src/mame/drivers/portrait.cpp
@@ -325,7 +325,7 @@ ROM_START( portraita )
 	ROM_LOAD( "port_w.bin",  0x0000, 0x0800, CRC(d3a4e950) SHA1(0a399d43c7690d568874f3b1d55135f803fc223f) )
 	ROM_LOAD( "port_ma.bin", 0x0800, 0x0800, CRC(ee242e4f) SHA1(fb67e0d136927e04f4fa819f684c97b0d52ee48c) )
 
-	ROM_REGION( 0x20000, "gfx1", ROMREGION_INVERT )
+	ROM_REGION( 0x20000, "gfx1", 0 )
 	ROM_LOAD( "port_00.a1", 0x00000, 0x2000, CRC(eb3e1c12) SHA1(2d38b66f52546b40553244c8a5c961279559f5b6) ) /*bit plane 1*/
 	ROM_LOAD( "port_10.b1", 0x02000, 0x2000, CRC(0f44e377) SHA1(1955f9f4deab2166f637f43c1f326bd65fc90f6a) ) /*bit plane 1*/
 	ROM_LOAD( "port_02.d1", 0x04000, 0x2000, CRC(bd93a3f9) SHA1(9cb479b8840cafd6043ff0cb9d5ca031dcd332ba) ) /*bit plane 2*/