diff --git a/src/mame/drivers/cmi.cpp b/src/mame/drivers/cmi.cpp
index 7bb2a585f4d..3e44aa91d6b 100644
--- a/src/mame/drivers/cmi.cpp
+++ b/src/mame/drivers/cmi.cpp
@@ -663,9 +663,6 @@ private:
 	UINT8 	m_msm5832_addr;
 	int		m_mkbd_kbd_acia_irq;
 	int		m_mkbd_cmi_acia_irq;
-	int		m_mkbd_tx_start;
-	int		m_mkbd_tx_bits;
-	int		m_mkbd_tx_reg;
 
 	// Alphanumeric keyboard
 	int		m_ank_irqa;