diff --git a/src/mame/drivers/vt100.cpp b/src/mame/drivers/vt100.cpp
index 7b7cba9885f..44df582d76e 100644
--- a/src/mame/drivers/vt100.cpp
+++ b/src/mame/drivers/vt100.cpp
@@ -289,7 +289,7 @@ MACHINE_CONFIG_START(vt100_state::vt100)
 	MCFG_RS232_RXD_HANDLER(DEVWRITELINE("pusart", i8251_device, write_rxd))
 	MCFG_RS232_DSR_HANDLER(DEVWRITELINE("pusart", i8251_device, write_dsr))
 
-	MCFG_DEVICE_ADD("dbrg", COM5016_013, XTAL(24'883'200) / 9) // COM5016T-013, 2.7648Mhz Clock
+	MCFG_DEVICE_ADD("dbrg", COM5016_013, XTAL(24'883'200) / 9) // COM5016T-013 (or WD1943CD-02), 2.7648Mhz Clock
 	MCFG_COM8116_FR_HANDLER(DEVWRITELINE("pusart", i8251_device, write_rxc))
 	MCFG_COM8116_FT_HANDLER(DEVWRITELINE("pusart", i8251_device, write_txc))