diff --git a/src/NeoSWSerial.cpp b/src/NeoSWSerial.cpp
index ce8edfe..a1e5bf7 100644
--- a/src/NeoSWSerial.cpp
+++ b/src/NeoSWSerial.cpp
@@ -135,7 +135,7 @@ void NeoSWSerial::listen()
   if (listener)
     listener->ignore();
 
-  pinMode(rxPin, INPUT);
+  pinMode(rxPin, INPUT_PULLUP);
   rxBitMask = digitalPinToBitMask( rxPin );
   rxPort    = portInputRegister( digitalPinToPort( rxPin ) );
 
@@ -268,6 +268,17 @@ int NeoSWSerial::available()
 
 //----------------------------------------------------------------------------
 
+int NeoSWSerial::peek(void)
+{
+  if (rxHead == rxTail) {
+    return -1;
+  } else {
+    return rxBuffer[rxTail];
+  }
+} // peek
+
+//----------------------------------------------------------------------------
+
 int NeoSWSerial::read()
 {
   if (rxHead == rxTail) return -1;