diff --git a/include/boost/fusion/sequence/adapted/variant.hpp b/include/boost/fusion/sequence/adapted/variant.hpp
index ce2f2ebb..53be7781 100644
--- a/include/boost/fusion/sequence/adapted/variant.hpp
+++ b/include/boost/fusion/sequence/adapted/variant.hpp
@@ -10,6 +10,9 @@
 #define BOOST_FUSION_VARIANT_12112006_1614
 
 #include <boost/fusion/sequence/adapted/variant/variant_iterator.hpp>
+#include <boost/fusion/sequence/adapted/variant/detail/is_view_impl.hpp>
+#include <boost/fusion/sequence/adapted/variant/detail/is_sequence_impl.hpp>
+#include <boost/fusion/sequence/adapted/variant/detail/category_of_impl.hpp>
 #include <boost/fusion/sequence/adapted/variant/tag_of.hpp>
 #include <boost/fusion/sequence/adapted/variant/detail/size_impl.hpp>
 #include <boost/fusion/sequence/adapted/variant/detail/begin_impl.hpp>
diff --git a/include/boost/fusion/sequence/adapted/variant/variant_iterator.hpp b/include/boost/fusion/sequence/adapted/variant/variant_iterator.hpp
index 3be08e93..06500409 100644
--- a/include/boost/fusion/sequence/adapted/variant/variant_iterator.hpp
+++ b/include/boost/fusion/sequence/adapted/variant/variant_iterator.hpp
@@ -18,6 +18,7 @@
 #include <boost/mpl/eval_if.hpp>
 #include <boost/type_traits/is_const.hpp>
 #include <boost/type_traits/add_const.hpp>
+#include <boost/type_traits/add_reference.hpp>
 
 namespace boost { namespace fusion {