diff --git a/src/mame/drivers/viper.c b/src/mame/drivers/viper.c
index a563e8c3f64..0d43cd0631c 100644
--- a/src/mame/drivers/viper.c
+++ b/src/mame/drivers/viper.c
@@ -864,7 +864,7 @@ ROM_START(sogeki) //*
 	ROM_LOAD("nvram.u39", 0x000000, 0x2000, CRC(2f325c55) SHA1(0bc44f40f981a815c8ce64eae95ae55db510c565))
 
 	DISK_REGION( "ide" )
-	DISK_IMAGE( "a13b02", 0, BAD_DUMP SHA1(d518111819cde7f78de8d4702a04f93871da4f8d) )
+	DISK_IMAGE( "a13b02", 0, SHA1(c25a61b76d365794c2da4a9e7de88a5519e944ec) )
 ROM_END
 
 ROM_START(thrild2) //*