diff --git a/variants/arduino_zero/variant.cpp b/variants/arduino_zero/variant.cpp
index 997bc3265e9c9b28c50e3ddde7a6999379755173..960789ecb9549c90bd988c66f0e64d392f54c197 100644
--- a/variants/arduino_zero/variant.cpp
+++ b/variants/arduino_zero/variant.cpp
@@ -207,5 +207,5 @@ SERCOM sercom3( SERCOM3 ) ;
 SERCOM sercom4( SERCOM4 ) ;
 SERCOM sercom5( SERCOM5 ) ;
 
-Uart Serial1( &sercom0, PIN_SERIAL_RX, PIN_SERIAL_TX ) ;
+Uart Serial1( &sercom0, PIN_SERIAL1_RX, PIN_SERIAL1_TX ) ;
 Uart Serial( &sercom5, PIN_SERIAL_RX, PIN_SERIAL_TX ) ;