Index: libs/interprocess/example/doc_named_mutex.cpp
===================================================================
--- libs/interprocess/example/doc_named_mutex.cpp	(revision 49856)
+++ libs/interprocess/example/doc_named_mutex.cpp	(working copy)
@@ -11,6 +11,7 @@
 //[doc_named_mutex
 #include <boost/interprocess/sync/scoped_lock.hpp>
 #include <boost/interprocess/sync/named_mutex.hpp>
+#include <iostream>
 #include <fstream>
 
 int main ()