diff --git a/include/boost/fusion/functional/adapter/unfused_lvalue_args.hpp b/include/boost/fusion/functional/adapter/unfused_lvalue_args.hpp
index 6faf51be..26f79c4e 100644
--- a/include/boost/fusion/functional/adapter/unfused_lvalue_args.hpp
+++ b/include/boost/fusion/functional/adapter/unfused_lvalue_args.hpp
@@ -18,6 +18,8 @@
 #include <boost/type_traits/remove_reference.hpp>
 #include <boost/type_traits/remove_const.hpp>
 
+#include <boost/utility/result_of.hpp>
+
 #include <boost/fusion/sequence/container/vector/vector.hpp>
 
 #include <boost/fusion/functional/adapter/limits.hpp>
diff --git a/include/boost/fusion/functional/adapter/unfused_rvalue_args.hpp b/include/boost/fusion/functional/adapter/unfused_rvalue_args.hpp
index 230fee81..9a95804a 100644
--- a/include/boost/fusion/functional/adapter/unfused_rvalue_args.hpp
+++ b/include/boost/fusion/functional/adapter/unfused_rvalue_args.hpp
@@ -18,6 +18,8 @@
 #include <boost/type_traits/remove_reference.hpp>
 #include <boost/type_traits/remove_const.hpp>
 
+#include <boost/utility/result_of.hpp>
+
 #include <boost/fusion/sequence/container/vector/vector.hpp>
 
 #include <boost/fusion/functional/adapter/limits.hpp>