diff --git a/src/machine/board_wioterminal.go b/src/machine/board_wioterminal.go
index c19de464..c0f13ef0 100644
--- a/src/machine/board_wioterminal.go
+++ b/src/machine/board_wioterminal.go
@@ -345,6 +345,8 @@ const (
 )
 
 var (
+	DefaultUART = UART1
+
 	UART1 = &sercomUSART2
 
 	// RTL8720D