diff --git a/Adafruit_TSL2561_U.cpp b/Adafruit_TSL2561_U.cpp
index f08f92d..fca150c 100644
--- a/Adafruit_TSL2561_U.cpp
+++ b/Adafruit_TSL2561_U.cpp
@@ -39,7 +39,6 @@
 /**************************************************************************/
 
 #include "Adafruit_TSL2561_U.h"
-#include "avr/delay.h"
 
 /*========================================================================*/
 /*                            CONSTRUCTORS                                */