diff --git a/include/yaml-cpp/node/detail/node_data.h b/include/yaml-cpp/node/detail/node_data.h
index 50dd85a..2892610 100644
--- a/include/yaml-cpp/node/detail/node_data.h
+++ b/include/yaml-cpp/node/detail/node_data.h
@@ -13,6 +13,8 @@
 #include "yaml-cpp/node/type.h"
 #include <boost/utility.hpp>
 #include <list>
+#include <map>
+#include <string>
 #include <utility>
 #include <vector>