diff --git a/test/file_mapping_test.cpp b/test/file_mapping_test.cpp
index b9851c9..53182d1 100644
--- a/test/file_mapping_test.cpp
+++ b/test/file_mapping_test.cpp
@@ -11,6 +11,7 @@
 #include <boost/interprocess/detail/config_begin.hpp>
 #include <fstream>
 #include <iostream>
+#include <ios>
 #include <boost/interprocess/file_mapping.hpp>
 #include <boost/interprocess/mapped_region.hpp>
 #include <memory>