diff --git a/alienfx.cpp b/alienfx.cpp
index 5981039..aea8992 100644
--- a/alienfx.cpp
+++ b/alienfx.cpp
@@ -13,6 +13,7 @@
 #include <string.h>
 #include <iostream>
 #include <libusb-1.0/libusb.h>
+#include <unistd.h>
 
 using namespace std;