diff --git a/src/mess/machine/isa_ibm_mfc.c b/src/mess/machine/isa_ibm_mfc.c
index caa18538942..ed98b8ee609 100644
--- a/src/mess/machine/isa_ibm_mfc.c
+++ b/src/mess/machine/isa_ibm_mfc.c
@@ -252,40 +252,35 @@ static I8255_INTERFACE( d71055c_1_intf )
 //  D8253 PIT
 //-------------------------------------------------
 
-WRITE_LINE_MEMBER( isa8_ibm_mfc_device::d8253_clk0_out )
+WRITE_LINE_MEMBER( isa8_ibm_mfc_device::d8253_out0 )
 {
 	if (m_tcr & TCR_TAE)
 		set_pc_interrupt(PC_IRQ_TIMERA, 1);
 }
 
-WRITE_LINE_MEMBER( isa8_ibm_mfc_device::d8253_clk1_out )
+WRITE_LINE_MEMBER( isa8_ibm_mfc_device::d8253_out1 )
 {
 	if (m_tcr & TCR_TBE)
 		set_pc_interrupt(PC_IRQ_TIMERB, 1);
 }
 
-WRITE_LINE_MEMBER( isa8_ibm_mfc_device::d8253_clk2_out )
-{
-	m_d8253->clk1_w(state);
-}
-
 static const struct pit8253_interface d8253_intf =
 {
 	{
 		{
 			XTAL_4MHz / 8,
 			DEVCB_NULL,
-			DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, isa8_ibm_mfc_device, d8253_clk0_out)
+			DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, isa8_ibm_mfc_device, d8253_out0)
 		},
 		{
 			0,
 			DEVCB_NULL,
-			DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, isa8_ibm_mfc_device, d8253_clk1_out)
+			DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, isa8_ibm_mfc_device, d8253_out1)
 		},
 		{
 			XTAL_4MHz / 2,
 			DEVCB_NULL,
-			DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, isa8_ibm_mfc_device, d8253_clk2_out)
+			DEVCB_DEVICE_LINE_MEMBER("d8253", pit8253_device, clk1_w)
 		}
 	}
 };
diff --git a/src/mess/machine/isa_ibm_mfc.h b/src/mess/machine/isa_ibm_mfc.h
index 774746c3146..11f37a8f399 100644
--- a/src/mess/machine/isa_ibm_mfc.h
+++ b/src/mess/machine/isa_ibm_mfc.h
@@ -43,9 +43,8 @@ public:
 	DECLARE_READ8_MEMBER( ibm_mfc_r );
 	DECLARE_WRITE8_MEMBER( ibm_mfc_w );
 
-	DECLARE_WRITE_LINE_MEMBER( d8253_clk0_out );
-	DECLARE_WRITE_LINE_MEMBER( d8253_clk1_out );
-	DECLARE_WRITE_LINE_MEMBER( d8253_clk2_out );
+	DECLARE_WRITE_LINE_MEMBER( d8253_out0 );
+	DECLARE_WRITE_LINE_MEMBER( d8253_out1 );
 
 	DECLARE_WRITE_LINE_MEMBER( write_usart_clock );