diff --git a/libstdc++-v3/src/c++23/std.cc.in b/libstdc++-v3/src/c++23/std.cc.in
index 9301ed9..ec048f6 100644
--- a/libstdc++-v3/src/c++23/std.cc.in
+++ b/libstdc++-v3/src/c++23/std.cc.in
@@ -1982,6 +1982,10 @@
   using std::polymorphic;
   namespace pmr { using std::pmr::polymorphic; }
 #endif
+#if __cpp_lib_smart_ptr_owner_equality
+  using std::owner_equal;
+  using std::owner_hash;
+#endif
 }
 
 // 20.4 <memory_resource>