diff --git a/src/mame/drivers/gottlieb.cpp b/src/mame/drivers/gottlieb.cpp
index 3c65b88ddcd..032cdc9f4ed 100644
--- a/src/mame/drivers/gottlieb.cpp
+++ b/src/mame/drivers/gottlieb.cpp
@@ -1803,7 +1803,7 @@ static MACHINE_CONFIG_DERIVED( g2laser, gottlieb_core )
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 1.0)
 
 	MCFG_LASERDISC_PR8210_ADD("laserdisc")
-	MCFG_LASERDISC_AUDIO(laserdisc_audio_delegate(gottlieb_state::laserdisc_audio_process, (gottlieb_state*)owner))
+	MCFG_LASERDISC_AUDIO(laserdisc_audio_delegate(&gottlieb_state::laserdisc_audio_process, (gottlieb_state*)owner))
 	MCFG_LASERDISC_OVERLAY_DRIVER(GOTTLIEB_VIDEO_HCOUNT, GOTTLIEB_VIDEO_VCOUNT, gottlieb_state, screen_update_gottlieb)
 	MCFG_LASERDISC_OVERLAY_CLIP(0, GOTTLIEB_VIDEO_HBLANK-1, 0, GOTTLIEB_VIDEO_VBLANK-8)
 	MCFG_LASERDISC_OVERLAY_PALETTE("palette")
@@ -1896,7 +1896,7 @@ static MACHINE_CONFIG_DERIVED( cobram3, gottlieb_core )
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 1.0)
 
 	MCFG_LASERDISC_PR8210_ADD("laserdisc")
-	MCFG_LASERDISC_AUDIO(laserdisc_audio_delegate(gottlieb_state::laserdisc_audio_process, (gottlieb_state*)owner))
+	MCFG_LASERDISC_AUDIO(laserdisc_audio_delegate(&gottlieb_state::laserdisc_audio_process, (gottlieb_state*)owner))
 	MCFG_LASERDISC_OVERLAY_DRIVER(GOTTLIEB_VIDEO_HCOUNT, GOTTLIEB_VIDEO_VCOUNT, gottlieb_state, screen_update_gottlieb)
 	MCFG_LASERDISC_OVERLAY_CLIP(0, GOTTLIEB_VIDEO_HBLANK-1, 0, GOTTLIEB_VIDEO_VBLANK-8)
 	MCFG_LASERDISC_OVERLAY_PALETTE("palette")