diff --git a/src/emu/bus/abcbus/lux10828.c b/src/emu/bus/abcbus/lux10828.c
index 2616f3aaea8..34480b39d2a 100644
--- a/src/emu/bus/abcbus/lux10828.c
+++ b/src/emu/bus/abcbus/lux10828.c
@@ -334,8 +334,8 @@ static MACHINE_CONFIG_FRAGMENT( luxor_55_10828 )
 	MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0))
 	MCFG_Z80PIO_IN_PA_CB(READ8(luxor_55_10828_device, pio_pa_r))
 	MCFG_Z80PIO_OUT_PA_CB(WRITE8(luxor_55_10828_device, pio_pa_w))
-	MCFG_Z80PIO_IN_PA_CB(READ8(luxor_55_10828_device, pio_pb_r))
-	MCFG_Z80PIO_OUT_PA_CB(WRITE8(luxor_55_10828_device, pio_pb_w))
+	MCFG_Z80PIO_IN_PB_CB(READ8(luxor_55_10828_device, pio_pb_r))
+	MCFG_Z80PIO_OUT_PB_CB(WRITE8(luxor_55_10828_device, pio_pb_w))
 
 	MCFG_MB8876x_ADD(MB8876_TAG, XTAL_4MHz/2)
 	MCFG_WD_FDC_INTRQ_CALLBACK(WRITELINE(luxor_55_10828_device, fdc_intrq_w))