Index: src/mongo/scripting/engine.cpp
--- src/mongo/scripting/engine.cpp.orig
+++ src/mongo/scripting/engine.cpp
@@ -33,6 +33,7 @@
 
 #include "mongo/scripting/engine.h"
 
+#include <boost/filesystem/directory.hpp>
 #include <boost/filesystem/operations.hpp>
 #include <cctype>
 
