diff --git a/src/mame/drivers/goldnpkr.cpp b/src/mame/drivers/goldnpkr.cpp
index 0b934813653..1d71c1ced30 100644
--- a/src/mame/drivers/goldnpkr.cpp
+++ b/src/mame/drivers/goldnpkr.cpp
@@ -4705,7 +4705,11 @@ MACHINE_CONFIG_START(blitz_state::megadpkr)
 	MCFG_DEVICE_ADD("maincpu", M6502, CPU_CLOCK)
 	MCFG_DEVICE_PROGRAM_MAP(megadpkr_map)
 
-	ADDRESS_MAP_BANK(config, "bankdev").set_map(&blitz_state::megadpkr_banked_map).set_data_width(8).set_addr_width(16).set_stride(0x1000);
+	ADDRESS_MAP_BANK(config, m_bankdev);
+	m_bankdev->set_map(&blitz_state::megadpkr_banked_map);
+	m_bankdev->set_data_width(8);
+	m_bankdev->set_addr_width(16);
+	m_bankdev->set_stride(0x4000);
 
 	MCFG_DEVICE_ADD("mcu", M68705P5, CPU_CLOCK) /* unknown */
 	MCFG_M68705_PORTB_W_CB(WRITE8(*this, blitz_state, mcu_portb_w))