diff --git a/conf.pri.windows b/conf.pri.windows
index 8b665695c..0b845b618 100644
--- a/conf.pri.windows
+++ b/conf.pri.windows
@@ -37,6 +37,8 @@ DEFINES += BOOST_ALL_NO_LIB
 # Use one of the following options
 DEFINES += BOOST_SYSTEM_STATIC_LINK
 #DEFINES += BOOST_SYSTEM_DYN_LINK
+# Enable it if compiling with libtorrent 3.x
+#DEFINES += BOOST_SYSTEM_USE_UTF8
 
 # Enable if libtorrent was built with this flag defined
 #DEFINES += TORRENT_NO_DEPRECATE