diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 0cbdc07375d..331d01ea0d0 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,15 @@
+2020-01-09  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/93208
+	* config/abi/pre/gnu.ver: Add new exports.
+	* include/std/memory_resource (memory_resource::~memory_resource()):
+	Do not define inline.
+	(monotonic_buffer_resource::~monotonic_buffer_resource()): Likewise.
+	* src/c++17/memory_resource.cc (memory_resource::~memory_resource()):
+	Define.
+	(monotonic_buffer_resource::~monotonic_buffer_resource()): Define.
+	* testsuite/20_util/monotonic_buffer_resource/93208.cc: New test.
+
 2020-01-09  François Dumont  <fdumont@gcc.gnu.org>
 
 	PR libstdc++/92124
diff --git a/libstdc++-v3/config/abi/pre/gnu.ver b/libstdc++-v3/config/abi/pre/gnu.ver
index 7f84f3e2644..edf4485e607 100644
--- a/libstdc++-v3/config/abi/pre/gnu.ver
+++ b/libstdc++-v3/config/abi/pre/gnu.ver
@@ -2291,6 +2291,12 @@ GLIBCXX_3.4.28 {
     _ZNSt12__shared_ptrINSt10filesystem28recursive_directory_iterator10_Dir_stackELN9__gnu_cxx12_Lock_policyE[012]EEC2EOS5_;
     _ZNSt12__shared_ptrINSt10filesystem7__cxx1128recursive_directory_iterator10_Dir_stackELN9__gnu_cxx12_Lock_policyE[012]EEC2EOS6_;
 
+    # key functions, vtables and rtti for memory resources
+    _ZNSt3pmr15memory_resourceD[0125]Ev;
+    _ZT[ISV]NSt3pmr15memory_resourceE;
+    _ZNSt3pmr25monotonic_buffer_resourceD[0125]Ev;
+    _ZT[ISV]NSt3pmr25monotonic_buffer_resourceE;
+
 } GLIBCXX_3.4.27;
 
 # Symbols in the support library (libsupc++) have their own tag.
diff --git a/libstdc++-v3/include/std/memory_resource b/libstdc++-v3/include/std/memory_resource
index ee2d9837050..13be3e9dc75 100644
--- a/libstdc++-v3/include/std/memory_resource
+++ b/libstdc++-v3/include/std/memory_resource
@@ -88,7 +88,7 @@ namespace pmr
   public:
     memory_resource() = default;
     memory_resource(const memory_resource&) = default;
-    virtual ~memory_resource() = default;
+    virtual ~memory_resource(); // key function
 
     memory_resource& operator=(const memory_resource&) = default;
 
@@ -600,7 +600,7 @@ namespace pmr
 
     monotonic_buffer_resource(const monotonic_buffer_resource&) = delete;
 
-    virtual ~monotonic_buffer_resource() { release(); }
+    virtual ~monotonic_buffer_resource(); // key function
 
     monotonic_buffer_resource&
     operator=(const monotonic_buffer_resource&) = delete;
diff --git a/libstdc++-v3/src/c++17/memory_resource.cc b/libstdc++-v3/src/c++17/memory_resource.cc
index fa3d6cd61f2..37386cdddfd 100644
--- a/libstdc++-v3/src/c++17/memory_resource.cc
+++ b/libstdc++-v3/src/c++17/memory_resource.cc
@@ -37,6 +37,10 @@ namespace std _GLIBCXX_VISIBILITY(default)
 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 namespace pmr
 {
+  // This was defined inline in 9.1 and 9.2 so code compiled by those
+  // versions will not use this symbol.
+  memory_resource::~memory_resource() = default;
+
   namespace
   {
     class newdel_res_t final : public memory_resource
@@ -167,6 +171,10 @@ namespace pmr
 
   // Member functions for std::pmr::monotonic_buffer_resource
 
+  // This was defined inline in 9.1 and 9.2 so code compiled by those
+  // versions will not use this symbol.
+  monotonic_buffer_resource::~monotonic_buffer_resource() { release(); }
+
   // Memory allocated by the upstream resource is managed in a linked list
   // of _Chunk objects. A _Chunk object recording the size and alignment of
   // the allocated block and a pointer to the previous chunk is placed
diff --git a/libstdc++-v3/testsuite/20_util/monotonic_buffer_resource/93208.cc b/libstdc++-v3/testsuite/20_util/monotonic_buffer_resource/93208.cc
new file mode 100644
index 00000000000..b0cfdbddad2
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/monotonic_buffer_resource/93208.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-options "-std=gnu++17" }
+// { dg-do compile { target c++17 } }
+// { dg-final { scan-assembler-not "_ZT\[IS\]NSt3pmr15memory_resourceE" } }
+// { dg-final { scan-assembler-not "_ZT\[IS\]NSt3pmr25monotonic\[a-z_\]*E" } }
+
+#include <memory_resource>
+
+void* f(int n)
+{
+  std::pmr::monotonic_buffer_resource res;
+  return res.allocate(n);
+}