diff --git a/test/boost_no_cxx11_hdr_future.ipp b/test/boost_no_cxx11_hdr_future.ipp
index b19302d0..ea65a436 100644
--- a/test/boost_no_cxx11_hdr_future.ipp
+++ b/test/boost_no_cxx11_hdr_future.ipp
@@ -22,8 +22,6 @@ int test()
   using std::future_category;
   using std::future_error;
   using std::promise;
-  using std::promise;
-  using std::promise;
   using std::future;
   using std::shared_future;
   using std::packaged_task; // undefined