diff --git a/Include/Fs/Path.h b/Include/Fs/Path.h
index 0ad7207..565c7f6 100644
--- a/Include/Fs/Path.h
+++ b/Include/Fs/Path.h
@@ -19,6 +19,7 @@
 #ifndef PATH_H__
 #define PATH_H__
 
+#include <unistd.h>
 #include <iostream>
 using namespace std;