diff --git a/src/devices/bus/ti99/peb/ti_rs232.cpp b/src/devices/bus/ti99/peb/ti_rs232.cpp
index cbc164bbcb2..1ebae489d3a 100644
--- a/src/devices/bus/ti99/peb/ti_rs232.cpp
+++ b/src/devices/bus/ti99/peb/ti_rs232.cpp
@@ -1092,7 +1092,7 @@ INPUT_PORTS_START( ti_rs232 )
 	PORT_START( "CRURS232"  )
 	PORT_DIPNAME( 0x01, 0x00, "TI-RS232 CRU base" )
 		PORT_DIPSETTING(    0x00, "1300" )
-		PORT_DIPSETTING(    0x00, "1500" )
+		PORT_DIPSETTING(    0x01, "1500" )
 
 	PORT_START( "SERIALMAP" )
 	PORT_CONFNAME( 0x03, 0x00, "Serial cable pin mapping" )