diff --git a/src/emu/machine/6526cia.c b/src/emu/machine/6526cia.c
index 1eb80c81fc7..7794b0b62e7 100644
--- a/src/emu/machine/6526cia.c
+++ b/src/emu/machine/6526cia.c
@@ -498,7 +498,7 @@ void legacy_mos6526_device::clock_tod()
     cnt_w
 -------------------------------------------------*/
 
-void legacy_mos6526_device::cnt_w(UINT8 state)
+WRITE_LINE_MEMBER(legacy_mos6526_device::cnt_w)
 {
 	/* is this a rising edge? */
 	if (!m_cnt && state)
@@ -543,7 +543,7 @@ void legacy_mos6526_device::cnt_w(UINT8 state)
 	m_cnt = state;
 }
 
-void legacy_mos6526_device::flag_w(UINT8 state)
+WRITE_LINE_MEMBER(legacy_mos6526_device::flag_w)
 {
 	/* falling edge */
 	if (m_flag && !state)
diff --git a/src/emu/machine/6526cia.h b/src/emu/machine/6526cia.h
index 5eb32c1d47b..e44a36bfbe4 100644
--- a/src/emu/machine/6526cia.h
+++ b/src/emu/machine/6526cia.h
@@ -117,16 +117,14 @@ public:
 
 	/* serial counter */
 	DECLARE_READ_LINE_MEMBER( cnt_r ) { return m_cnt; }
-	void cnt_w(UINT8 state);
-	DECLARE_WRITE_LINE_MEMBER( cnt_w ) { cnt_w(state); }
+	DECLARE_WRITE_LINE_MEMBER( cnt_w );
 
 	/* serial port */
 	DECLARE_READ_LINE_MEMBER( sp_r ) { return m_sp; }
 	DECLARE_WRITE_LINE_MEMBER( sp_w ) { m_sp = state; }
 
 	/* flag */
-	void flag_w(UINT8 state);
-	DECLARE_WRITE_LINE_MEMBER( flag_w ) { flag_w(state); }
+	DECLARE_WRITE_LINE_MEMBER( flag_w );
 
 	/* port mask */
 	void set_port_mask_value(int port, int data);