diff --git a/src/mame/drivers/trackfld.c b/src/mame/drivers/trackfld.c
index 86199b663c3..1fa7fef0ab3 100644
--- a/src/mame/drivers/trackfld.c
+++ b/src/mame/drivers/trackfld.c
@@ -1479,6 +1479,16 @@ DRIVER_INIT_MEMBER(trackfld_state,trackfld)
 {
 }
 
+DRIVER_INIT_MEMBER(trackfld_state, trackfldnz)
+{
+	UINT8 *ROM = memregion("maincpu")->base();
+	int i;
+
+	/* decrypt program rom */
+	for (i = 0x6000; i < 0x10000; i++)
+		ROM[i] = BITSWAP8(ROM[i], 6, 7, 5, 4, 3, 2, 1, 0);
+}
+
 DRIVER_INIT_MEMBER(trackfld_state,atlantol)
 {
 	address_space &space = m_maincpu->space(AS_PROGRAM);
@@ -1547,7 +1557,7 @@ GAME( 1983, hyprolym,  trackfld, trackfld, trackfld, trackfld_state, trackfld, R
 GAME( 1983, hyprolymb, trackfld, hyprolyb, trackfld, trackfld_state, trackfld, ROT0,  "bootleg",                              "Hyper Olympic (bootleg, set 1)", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )
 GAME( 1983, hyprolymba,trackfld, hyprolyb, trackfld, trackfld_state, trackfld, ROT0,  "bootleg",                              "Hyper Olympic (bootleg, set 2)", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )
 GAME( 1996, atlantol,  trackfld, atlantol, atlantol, trackfld_state, atlantol, ROT0,  "bootleg",                              "Atlant Olimpic", MACHINE_SUPPORTS_SAVE )
-GAME( 1982, trackfldnz,trackfld, trackfld, trackfld, trackfld_state, trackfld, ROT0,  "bootleg? (Goldberg Enterprizes Inc.)", "Track & Field (NZ bootleg?)", MACHINE_NOT_WORKING)
+GAME( 1982, trackfldnz,trackfld, trackfld, trackfld, trackfld_state, trackfldnz,ROT0, "bootleg? (Goldberg Enterprizes Inc.)", "Track & Field (NZ bootleg?)", MACHINE_SUPPORTS_SAVE) // bootleg of the Centuri version
 
 GAME( 1988, mastkin,   0,        mastkin,  mastkin, trackfld_state,  mastkin,  ROT0,  "Du Tech",                              "The Masters of Kin", MACHINE_WRONG_COLORS | MACHINE_SUPPORTS_SAVE )
 
diff --git a/src/mame/includes/trackfld.h b/src/mame/includes/trackfld.h
index 93df7e95d2f..bac83ad0c3e 100644
--- a/src/mame/includes/trackfld.h
+++ b/src/mame/includes/trackfld.h
@@ -67,6 +67,7 @@ public:
 	DECLARE_DRIVER_INIT(atlantol);
 	DECLARE_DRIVER_INIT(wizzquiz);
 	DECLARE_DRIVER_INIT(mastkin);
+	DECLARE_DRIVER_INIT(trackfldnz);
 
 	UINT8 m_SN76496_latch;
 	DECLARE_WRITE8_MEMBER( konami_SN76496_latch_w ) { m_SN76496_latch = data; };