diff --git a/src/mame/drivers/funkball.cpp b/src/mame/drivers/funkball.cpp
index 66940c5843c..c15c858e340 100644
--- a/src/mame/drivers/funkball.cpp
+++ b/src/mame/drivers/funkball.cpp
@@ -783,7 +783,7 @@ static MACHINE_CONFIG_START( funkball, funkball_state )
 	MCFG_DEVICE_PROGRAM_MAP(flashbank_map)
 	MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE)
 	MCFG_ADDRESS_MAP_BANK_DATABUS_WIDTH(32)
-	MCFG_ADDRESS_MAP_BANK_ADDRBUS_WIDTH(64)
+	MCFG_ADDRESS_MAP_BANK_ADDRBUS_WIDTH(32)
 	MCFG_ADDRESS_MAP_BANK_STRIDE(0x10000)
 
 	/* video hardware */