diff --git a/std/algorithm.hpp b/std/algorithm.hpp
index f824ca9361..a570667e5f 100644
--- a/std/algorithm.hpp
+++ b/std/algorithm.hpp
@@ -27,6 +27,7 @@ using std::set_union;
 using std::set_intersection;
 using std::set_difference;
 using std::set_symmetric_difference;
+using std::swap;
 using std::transform;
 
 #ifdef DEBUG_NEW