diff --git a/hardware/arduino/cores/arduino/HardwareSerial.cpp b/hardware/arduino/cores/arduino/HardwareSerial.cpp
index 7edfa84e4..230773589 100644
--- a/hardware/arduino/cores/arduino/HardwareSerial.cpp
+++ b/hardware/arduino/cores/arduino/HardwareSerial.cpp
@@ -434,7 +434,7 @@ try_again:
   {
     config_setting |= B10000000;
   }  
-  *_ucsrc = config_setting
+  *_ucsrc = config_setting;
   
   sbi(*_ucsrb, _rxen);
   sbi(*_ucsrb, _txen);