diff --git a/src/mame/drivers/merit.cpp b/src/mame/drivers/merit.cpp
index a531c99e1f5..143185ffef5 100644
--- a/src/mame/drivers/merit.cpp
+++ b/src/mame/drivers/merit.cpp
@@ -1018,7 +1018,7 @@ static INPUT_PORTS_START( casino5 )
 	PORT_DIPNAME( 0x10, 0x10, "Enable Acey Deucey" )    PORT_DIPLOCATION("SW1:5")
 	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x10, DEF_STR( On ) )
-	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )      PORT_DIPLOCATION("SW:6")
+	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )      PORT_DIPLOCATION("SW1:6")
 	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
 	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
 	PORT_DIPNAME( 0x40, 0x00, DEF_STR( Unknown ) )      PORT_DIPLOCATION("SW1:7")