diff --git a/test/generic_multiset_test.hpp b/test/generic_multiset_test.hpp
index 40288dd..a14f2cc 100644
--- a/test/generic_multiset_test.hpp
+++ b/test/generic_multiset_test.hpp
@@ -21,6 +21,7 @@
 #include "test_container.hpp"
 #include "generic_assoc_test.hpp"
 #include <typeinfo>
+#include <functional> //std::greater
 
 namespace boost{
 namespace intrusive{
diff --git a/test/generic_set_test.hpp b/test/generic_set_test.hpp
index 1f544b1..6e77196 100644
--- a/test/generic_set_test.hpp
+++ b/test/generic_set_test.hpp
@@ -21,6 +21,7 @@
 #include "test_container.hpp"
 #include "generic_assoc_test.hpp"
 #include <typeinfo>
+#include <functional> //std::greater
 #include <boost/intrusive/priority_compare.hpp>
 
 namespace boost{