diff --git a/cores/arduino/SERCOM.cpp b/cores/arduino/SERCOM.cpp
index 8bf5a4521..b9fbf05b9 100644
--- a/cores/arduino/SERCOM.cpp
+++ b/cores/arduino/SERCOM.cpp
@@ -112,8 +112,8 @@ void SERCOM::enableUART()
 void SERCOM::flushUART()
 {
   // Skip checking transmission completion if data register is empty
-  if(isDataRegisterEmptyUART())
-    return;
+//   if(isDataRegisterEmptyUART())
+//     return;
 
   // Wait for transmission to complete
   while(!sercom->USART.INTFLAG.bit.TXC);