diff --git a/src/machine/board_qtpy.go b/src/machine/board_qtpy.go
index 2d4f7fbe..e21e288a 100644
--- a/src/machine/board_qtpy.go
+++ b/src/machine/board_qtpy.go
@@ -94,8 +94,8 @@ const (
 // I2C on the QT Py M0.
 var (
 	I2C0 = &I2C{
-		Bus:    sam.SERCOM2_I2CM,
-		SERCOM: 2,
+		Bus:    sam.SERCOM1_I2CM,
+		SERCOM: 1,
 	}
 )