diff --git a/src/mame/yamaha/ympsr540.cpp b/src/mame/yamaha/ympsr540.cpp
index 7722baab179..0a829d5df09 100644
--- a/src/mame/yamaha/ympsr540.cpp
+++ b/src/mame/yamaha/ympsr540.cpp
@@ -64,8 +64,8 @@ ROM_START( psr540 )
 	ROM_LOAD16_WORD_SWAP( "xw25320.ic310", 0, 0x400000, CRC(e8d29e49) SHA1(079e0ccf6cf5d5bd2d2d82076b09dd702fcd1421))
 
 	ROM_REGION16_LE( 0x600000, "swx00", 0)
-	ROM_LOAD16_WORD_SWAP( "xw25320.ic310", 0, 0x400000, CRC(c7c4736d) SHA1(ff1052eb076557071ed8652e6c2fc0925144fbd5))
-	ROM_LOAD16_WORD_SWAP( "xw25320.ic310", 0, 0x200000, CRC(9ef56c4e) SHA1(f26b588f9bcfd7bdbf1c0b38e4a1ea57e2f29f10))
+	ROM_LOAD16_WORD_SWAP( "xw25320.ic210", 0, 0x400000, CRC(c7c4736d) SHA1(ff1052eb076557071ed8652e6c2fc0925144fbd5))
+	ROM_LOAD16_WORD_SWAP( "xw25320.ic220", 0, 0x200000, CRC(9ef56c4e) SHA1(f26b588f9bcfd7bdbf1c0b38e4a1ea57e2f29f10))
 ROM_END
 
 SYST( 1999, psr540, 0, 0, psr540, psr540, psr540_state, empty_init, "Yamaha", "PSR540", MACHINE_IS_SKELETON )