--- ipager.cpp_old	2012-10-28 23:54:15.000000000 +0100
+++ ipager.cpp	2012-10-28 23:54:21.000000000 +0100
@@ -34,7 +34,7 @@
 using namespace std;
 
 #include "pager.h"
-
+#include <unistd.h>
 
 void show_help(){