diff --git a/src/net/common/downloaderthread.cpp b/src/net/common/downloaderthread.cpp
index e2d1aba5..ffd6d2a2 100644
--- a/src/net/common/downloaderthread.cpp
+++ b/src/net/common/downloaderthread.cpp
@@ -23,6 +23,7 @@
 #include <boost/filesystem.hpp>
 #include <core/loghelper.h>
 
+#include <fstream>
 #include <algorithm>
 
 #define DOWNLOAD_DELAY_MSEC					10