diff --git a/src/DMXSerial.cpp b/src/DMXSerial.cpp
index 86534fd..642f825 100644
--- a/src/DMXSerial.cpp
+++ b/src/DMXSerial.cpp
@@ -63,11 +63,9 @@ typedef enum {
 
 #if defined(ARDUINO_ARCH_AVR)
 #include "DMXSerial_avr.h"
-#include <avr/interrupt.h>
 
 #elif defined(ARDUINO_ARCH_MEGAAVR)
 #include "DMXSerial_megaavr.h"
-#include "avr/io.h"
 
 #endif
 
@@ -242,6 +240,7 @@ bool DMXSerialClass::dataUpdated()
   return (_dmxUpdated);
 }
 
+
 // reset DMX data update flag.
 void DMXSerialClass::resetUpdated()
 {
diff --git a/src/DMXSerial.h b/src/DMXSerial.h
index f3ef2ea..b521145 100644
--- a/src/DMXSerial.h
+++ b/src/DMXSerial.h
@@ -30,6 +30,7 @@
 // 29.10.2017 documentation.
 // 
 // 07.02.2020 Refactored to support multiple hardware layers.
+// 26.02.2020 Version 1.5.0
 // - - - - -
 
 #ifndef DmxSerial_h
@@ -43,7 +44,7 @@
 
 #define DMXMODEPIN 2     ///< Arduino pin 2 for controlling the data direction is the default value.
 #define DmxModeOut HIGH  ///< set the level to HIGH for outgoing data direction
-#define DmxModeIn  LOW   ///< set the level to LOW  for incomming data direction
+#define DmxModeIn  LOW   ///< set the level to LOW  for incoming data direction
 
 #define DMXPROBE_RECV_MAX 50 // standard maximum of waiting for a DMX packet in DMXPROBE mode.