diff --git a/include/boost/container/detail/flat_tree.hpp b/include/boost/container/detail/flat_tree.hpp
index 93cdb61..1547ad6 100644
--- a/include/boost/container/detail/flat_tree.hpp
+++ b/include/boost/container/detail/flat_tree.hpp
@@ -26,7 +26,6 @@
 
 #include <boost/move/utility_core.hpp>
 
-#include <boost/container/detail/pair.hpp>
 #include <boost/container/vector.hpp>
 #include <boost/container/allocator_traits.hpp>