diff --git a/DCCTimerSTM32.cpp b/DCCTimerSTM32.cpp
index cffae40..7e121be 100644
--- a/DCCTimerSTM32.cpp
+++ b/DCCTimerSTM32.cpp
@@ -55,6 +55,7 @@ HardwareSerial Serial5(PD2, PC12);  // Rx=PC7, Tx=PC6 -- UART5 - F446RE
 #elif defined(ARDUINO_NUCLEO_F413ZH) || defined(ARDUINO_NUCLEO_F429ZI) || defined(ARDUINO_NUCLEO_F446ZE)|| defined(ARDUINO_NUCLEO_F412ZG) 
 // Nucleo-144 boards don't have Serial1 defined by default
 HardwareSerial Serial6(PG9, PG14);  // Rx=PG9, Tx=PG14 -- USART6
+HardwareSerial Serial5(PE7, PE8);  // Rx=PE7, Tx=PE8 -- USART5
 // Serial3 is defined to use USART3 by default, but is in fact used as the diag console
 // via the debugger on the Nucleo-144. It is therefore unavailable for other DCC-EX uses like WiFi, DFPlayer, etc.
 #else
diff --git a/IO_CMRI.h b/IO_CMRI.h
index bb1abfb..ef647b8 100644
--- a/IO_CMRI.h
+++ b/IO_CMRI.h
@@ -255,8 +255,10 @@ public:
       _nodeListStart = newNode;
     if (!_nodeListEnd) 
       _nodeListEnd = newNode;
-    else
+    else {
       _nodeListEnd->setNext(newNode);
+      _nodeListEnd = newNode;
+    }
   }
 
 protected: