diff --git a/libstdc++-v3/include/bits/hashtable_policy.h b/libstdc++-v3/include/bits/hashtable_policy.h
index 38bd5ae4e81..0109ef86a7b 100644
--- a/libstdc++-v3/include/bits/hashtable_policy.h
+++ b/libstdc++-v3/include/bits/hashtable_policy.h
@@ -1190,10 +1190,10 @@ namespace __detail
 	   typename _Hash, typename _RangeHash, typename _Unused>
     struct _Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHash,
 			   _Unused, false>
-    : private _Hashtable_ebo_helper<0, _Hash>
+    : private _Hashtable_ebo_helper<1, _Hash>
     {
     private:
-      using __ebo_hash = _Hashtable_ebo_helper<0, _Hash>;
+      using __ebo_hash = _Hashtable_ebo_helper<1, _Hash>;
 
       // Gives the local iterator implementation access to _M_bucket_index().
       friend struct _Local_iterator_base<_Key, _Value, _ExtractKey,
@@ -1260,10 +1260,10 @@ namespace __detail
 	   typename _Hash, typename _RangeHash, typename _Unused>
     struct _Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHash,
 			   _Unused, true>
-    : private _Hashtable_ebo_helper<0, _Hash>
+    : private _Hashtable_ebo_helper<1, _Hash>
     {
     private:
-      using __ebo_hash = _Hashtable_ebo_helper<0, _Hash>;
+      using __ebo_hash = _Hashtable_ebo_helper<1, _Hash>;
 
     public:
       typedef _Hash					hasher;
diff --git a/libstdc++-v3/testsuite/23_containers/unordered_map/dup_types.cc b/libstdc++-v3/testsuite/23_containers/unordered_map/dup_types.cc
new file mode 100644
index 00000000000..0a6053eca87
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/unordered_map/dup_types.cc
@@ -0,0 +1,29 @@
+// Copyright (C) 2020 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
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-do compile { target c++11 } }
+
+#include <unordered_map>
+
+struct Evil : std::hash<int>, std::equal_to<int>
+{ };
+
+void test01()
+{
+  std::unordered_map<int, int, Evil, Evil> h;
+  (void) h.key_eq();
+}