diff --git a/src/mame/drivers/attache.cpp b/src/mame/drivers/attache.cpp
index 639dd9bf875..c6ee8e916cd 100644
--- a/src/mame/drivers/attache.cpp
+++ b/src/mame/drivers/attache.cpp
@@ -1103,7 +1103,6 @@ static MACHINE_CONFIG_START( attache )
 	MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::green())
 	MCFG_SCREEN_RAW_PARAMS(XTAL_12_324MHz, 784, 0, 640, 262, 0, 240)
 	MCFG_SCREEN_UPDATE_DRIVER(attache_state, screen_update)
-	MCFG_SCREEN_VBLANK_CALLBACK(DEVWRITELINE("ctc", z80ctc_device, trg2))
 
 	MCFG_PALETTE_ADD_MONOCHROME_HIGHLIGHT("palette")
 
@@ -1141,6 +1140,7 @@ static MACHINE_CONFIG_START( attache )
 
 	MCFG_DEVICE_ADD("crtc", TMS9927, 12324000)
 	MCFG_TMS9927_CHAR_WIDTH(8)
+	MCFG_TMS9927_VSYN_CALLBACK(DEVWRITELINE("ctc", z80ctc_device, trg2))
 
 	MCFG_NVRAM_ADD_0FILL("nvram")
 
@@ -1166,7 +1166,6 @@ static MACHINE_CONFIG_START( attache816 )
 	MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::green())
 	MCFG_SCREEN_RAW_PARAMS(XTAL_12_324MHz, 784, 0, 640, 262, 0, 240)
 	MCFG_SCREEN_UPDATE_DRIVER(attache_state, screen_update)
-	MCFG_SCREEN_VBLANK_CALLBACK(DEVWRITELINE("ctc", z80ctc_device, trg2))
 
 	MCFG_PALETTE_ADD_MONOCHROME_HIGHLIGHT("palette")
 
@@ -1211,6 +1210,7 @@ static MACHINE_CONFIG_START( attache816 )
 
 	MCFG_DEVICE_ADD("crtc", TMS9927, 12324000)
 	MCFG_TMS9927_CHAR_WIDTH(8)
+	MCFG_TMS9927_VSYN_CALLBACK(DEVWRITELINE("ctc", z80ctc_device, trg2))
 
 	MCFG_NVRAM_ADD_0FILL("nvram")