diff --git a/src/emu/machine/cdp1871.c b/src/emu/machine/cdp1871.c
index 4042d9197d9..181f9facf33 100644
--- a/src/emu/machine/cdp1871.c
+++ b/src/emu/machine/cdp1871.c
@@ -98,7 +98,9 @@ cdp1871_device::cdp1871_device(const machine_config &mconfig, const char *tag, d
 		m_sense(0),
 		m_drive(0),
 		m_next_da(CLEAR_LINE),
-		m_next_rpt(CLEAR_LINE)
+		m_next_rpt(CLEAR_LINE),
+		m_da(0),
+		m_rpt(0)
 {
 }