diff --git a/src/mame/drivers/alien.cpp b/src/mame/drivers/alien.cpp
index 87ffb53174f..3e9acc190fe 100644
--- a/src/mame/drivers/alien.cpp
+++ b/src/mame/drivers/alien.cpp
@@ -239,7 +239,7 @@ ROM_START( dokodemo )
 	ROM_LOAD32_WORD( "ic30", 0x000000, 0x400000, BAD_DUMP CRC(6b2d2ef1) SHA1(0db6490b40c5716c1271b7f99608e8c7ad916516) ) //
 	ROM_LOAD32_WORD( "ic33", 0x000002, 0x400000, BAD_DUMP CRC(64049fc3) SHA1(b373b2c8cb4d66b9c700e0542bd26444484fae40) ) // modified boot roms from dkbanans
 
-	ROM_REGION( 0x800100, "ymz770b", 0 ) //sound samples flash rom, not really needed, programmed by boot loader
+	ROM_REGION( 0x800100, "ymz770b", ROMREGION_ERASEFF ) //sound samples flash rom, not really needed, programmed by boot loader
 
 	DISK_REGION( "card" ) //compact flash
 	DISK_IMAGE( "dokodemo", 0, SHA1(0c786b6857a29b26971578abe1c8439fe43d94b5) )
diff --git a/src/mame/drivers/hh_sm510.cpp b/src/mame/drivers/hh_sm510.cpp
index bb5263e6858..47ff5e45f7f 100644
--- a/src/mame/drivers/hh_sm510.cpp
+++ b/src/mame/drivers/hh_sm510.cpp
@@ -6987,7 +6987,7 @@ ROM_START( gnw_climber )
 	ROM_LOAD( "dr-106.program", 0x0000, 0x1000, CRC(2adcbd6d) SHA1(110dc08c65120ab2c76ee647e89aa2726e24ac1a) )
 
 	ROM_REGION( 0x100, "maincpu:melody", 0 )
-	ROM_LOAD( "dr-106.melody", 0x000, 0x100, CRC(c99d7998) SHA1(4f8cf35b13f8b7654e7186bfd67d197d9053e949) )
+	ROM_LOAD( "dr-106.melody", 0x000, 0x100, BAD_DUMP CRC(c99d7998) SHA1(4f8cf35b13f8b7654e7186bfd67d197d9053e949) )
 
 	ROM_REGION( 542332, "svg", 0)
 	ROM_LOAD( "gnw_climber.svg", 0, 542332, CRC(d7e84c21) SHA1(a5b5b68c8cdb3a09966bfb91b281791bef311248) )