X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=libstdc%2B%2B-v3%2Ftestsuite%2F25_algorithms%2Fset_union%2Fconstexpr.cc;h=52b3103013efc2f3275c15e009b6d7b47831c4c6;hb=83ffe9cde7fe0b4deb0d1b54175fd9b19c38179c;hp=8782113738297d8bb701026724a20a55aa7d7bd6;hpb=7adcbafe45f8001b698967defe682687b52c0007;p=thirdparty%2Fgcc.git

diff --git a/libstdc++-v3/testsuite/25_algorithms/set_union/constexpr.cc b/libstdc++-v3/testsuite/25_algorithms/set_union/constexpr.cc
index 878211373829..52b3103013ef 100644
--- a/libstdc++-v3/testsuite/25_algorithms/set_union/constexpr.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/set_union/constexpr.cc
@@ -1,4 +1,4 @@
-// Copyright (C) 2019-2022 Free Software Foundation, Inc.
+// Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
@@ -20,6 +20,7 @@
 
 #include <algorithm>
 #include <array>
+#include <functional>
 
 constexpr bool
 test()