diff --git a/src/mame/drivers/flstory.cpp b/src/mame/drivers/flstory.cpp
index 08ce305e488..6882a887d58 100644
--- a/src/mame/drivers/flstory.cpp
+++ b/src/mame/drivers/flstory.cpp
@@ -1100,7 +1100,7 @@ ROM_START( flstory )
 	ROM_LOAD( "snd.23",       0x2000, 0x2000, CRC(25e7fd9d) SHA1(b9237459e3d8acf8502a693914e50714a37d515e) )
 
 	ROM_REGION( 0x0800, "bmcu:mcu", 0 )  /* 2k for the microcontroller */
-	ROM_LOAD( "a45.mcu",      0x0000, 0x0800, CRC(5378253c) SHA1(e1ae1ab01e470b896c1d74ad4088928602a21a1b) ) // bootleg MCU data
+	ROM_LOAD( "a45-20.mcu",   0x0000, 0x0800, CRC(7d2cdd9b) SHA1(b9a7b4c7d9d58b4b7cab1304beaa9d17f9559419) )
 
 	ROM_REGION( 0x20000, "gfx1", ROMREGION_INVERT )
 	ROM_LOAD( "vid-a45.18",   0x00000, 0x4000, CRC(6f08f69e) SHA1(8f1b7e63a38f855cf26d57aed678da7cf1378fdf) )
@@ -1124,7 +1124,7 @@ ROM_START( flstoryj )
 	ROM_LOAD( "a45_13.9",     0x2000, 0x2000, CRC(451f92f9) SHA1(f4196e6d3420983b74001303936d086a48b10827) )
 
 	ROM_REGION( 0x0800, "bmcu:mcu", 0 )  /* 2k for the microcontroller */
-	ROM_LOAD( "a45.mcu",      0x0000, 0x0800, CRC(5378253c) SHA1(e1ae1ab01e470b896c1d74ad4088928602a21a1b) ) // bootleg MCU data
+	ROM_LOAD( "a45-20.mcu",   0x0000, 0x0800, CRC(7d2cdd9b) SHA1(b9a7b4c7d9d58b4b7cab1304beaa9d17f9559419) )
 
 	ROM_REGION( 0x20000, "gfx1", ROMREGION_INVERT )
 	ROM_LOAD( "vid-a45.18",   0x00000, 0x4000, CRC(6f08f69e) SHA1(8f1b7e63a38f855cf26d57aed678da7cf1378fdf) )