diff --git a/src/mame/drivers/zwackery.cpp b/src/mame/drivers/zwackery.cpp
index 2c6239768a8..75d7ba90d70 100644
--- a/src/mame/drivers/zwackery.cpp
+++ b/src/mame/drivers/zwackery.cpp
@@ -500,7 +500,7 @@ void zwackery_state::zwackery(machine_config &config)
 {
 	// basic machine hardware
 	M68000(config, m_maincpu, 7652400);    // based on counter usage, should be XTAL(16'000'000)/2
-	m_maincpu->set_addrmap(AS_PROGRAM, zwackery_state::zwackery_map);
+	m_maincpu->set_addrmap(AS_PROGRAM, &zwackery_state::zwackery_map);
 
 	WATCHDOG_TIMER(config, m_watchdog);