diff --git a/DCCTimerSTM32.cpp b/DCCTimerSTM32.cpp
index 0976bcd..0f60507 100644
--- a/DCCTimerSTM32.cpp
+++ b/DCCTimerSTM32.cpp
@@ -39,7 +39,7 @@ HardwareSerial Serial1(PB7, PA15);  // Rx=PB7, Tx=PA15 -- CN7 pins 17 and 21 - F
 HardwareSerial Serial6(PA12, PA11);  // Rx=PA12, Tx=PA11 -- CN10 pins 12 and 14 - F411RE
 #elif defined(ARDUINO_NUCLEO_F446RE)
 // Nucleo-64 boards don't have Serial1 defined by default
-HardwareSerial Serial1(PA10, PB6);  // Rx=PA10, Tx=PB6 -- CN10 pins 17 and 33 - F446RE 
+HardwareSerial Serial1(PA10, PB6);  // Rx=PA10, Tx=PB6 -- CN10 pins 33 and 17 - F446RE 
 // Serial2 is defined to use USART2 by default, but is in fact used as the diag console
 // via the debugger on the Nucleo-64. It is therefore unavailable for other DCC-EX uses like WiFi, DFPlayer, etc.
 #elif defined(ARDUINO_NUCLEO_F412ZG) || defined(ARDUINO_NUCLEO_F429ZI) || defined(ARDUINO_NUCLEO_F446ZE)