diff --git a/components/files/multidircollection.cpp b/components/files/multidircollection.cpp
index c64f64376..b44c42986 100644
--- a/components/files/multidircollection.cpp
+++ b/components/files/multidircollection.cpp
@@ -5,6 +5,7 @@
 
 #include <algorithm>
 #include <stdexcept>
+#include <iostream>
 
 #include <boost/filesystem.hpp>