--- httpup-0.4.0k.orig/main.cpp
+++ httpup-0.4.0k/main.cpp
@@ -12,6 +12,7 @@
 #include <iostream>
 #include <string>
 #include <cstdlib>
+#include <unistd.h>
 using namespace std;
 
 #include "httpup.h"