diff --git a/src/machine/board_wioterminal.go b/src/machine/board_wioterminal.go
index 9923c371..15eefbed 100644
--- a/src/machine/board_wioterminal.go
+++ b/src/machine/board_wioterminal.go
@@ -90,7 +90,7 @@ const (
 	BCM10 = PB02 // SPI SDO
 	BCM11 = PB03 // SPI SCK
 	BCM12 = PB06
-	BCM13 = PA07
+	BCM13 = PA04
 	BCM14 = PB27 // UART Serial1
 	BCM15 = PB26 // UART Serial1
 	BCM16 = PB07