diff --git a/src/filesystem.cpp b/src/filesystem.cpp
index 4c3eb2ab..65c1ddf7 100644
--- a/src/filesystem.cpp
+++ b/src/filesystem.cpp
@@ -10,6 +10,8 @@
 #include <boost/config.hpp>
 #include <boost/filesystem.hpp>
 
+#include <fstream>
+
 #ifdef _WIN32
 # include <windows.h>
 # include <userenv.h>