add unistd.h include to fix compilation on gcc 4.7

1 files changed, 2 insertions, 0 deletions

diff --git a/main.cpp b/main.cpp
index 3040b9d..626fc84 100644
--- a/main.cpp
+++ b/main.cpp
@@ -14,6 +14,8 @@
 #include <cstdlib>
 using namespace std;
 
+#include <unistd.h>
+
 #include "httpup.h"
 #include "fileutils.h"
 #include "httpupargparser.h"