diff --git a/include/boost/smart_ptr/allocate_local_shared_array.hpp b/include/boost/smart_ptr/allocate_local_shared_array.hpp
index 0890849..89d3285 100644
--- a/include/boost/smart_ptr/allocate_local_shared_array.hpp
+++ b/include/boost/smart_ptr/allocate_local_shared_array.hpp
@@ -21,11 +21,12 @@ public:
         count_ = shared_count(base);
     }
 
-    virtual void local_cb_destroy() BOOST_SP_NOEXCEPT {
+    void local_cb_destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         shared_count().swap(count_);
     }
 
-    virtual shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT {
+    shared_count local_cb_get_shared_count() const
+        BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         return count_;
     }
 
diff --git a/include/boost/smart_ptr/allocate_shared_array.hpp b/include/boost/smart_ptr/allocate_shared_array.hpp
index bca9865..9bf7322 100644
--- a/include/boost/smart_ptr/allocate_shared_array.hpp
+++ b/include/boost/smart_ptr/allocate_shared_array.hpp
@@ -206,28 +206,29 @@ public:
         return state_;
     }
 
-    virtual void dispose() BOOST_SP_NOEXCEPT {
+    void dispose() BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         boost::alloc_destroy_n(state_.allocator(),
             boost::first_scalar(sp_array_start<type>(this)),
             state_.size() * sp_array_count<type>::value);
     }
 
-    virtual void destroy() BOOST_SP_NOEXCEPT {
+    void destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         sp_array_creator<allocator, sp_array_base> other(state_.allocator(),
             state_.size());
         this->~sp_array_base();
         other.destroy(this);
     }
 
-    virtual void* get_deleter(const sp_typeinfo_&) BOOST_SP_NOEXCEPT {
+    void* get_deleter(const sp_typeinfo_&) BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         return 0;
     }
 
-    virtual void* get_local_deleter(const sp_typeinfo_&) BOOST_SP_NOEXCEPT {
+    void* get_local_deleter(const sp_typeinfo_&)
+        BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         return 0;
     }
 
-    virtual void* get_untyped_deleter() BOOST_SP_NOEXCEPT {
+    void* get_untyped_deleter() BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         return 0;
     }
 
diff --git a/include/boost/smart_ptr/bad_weak_ptr.hpp b/include/boost/smart_ptr/bad_weak_ptr.hpp
index d0b3ff1..0a3cfcb 100644
--- a/include/boost/smart_ptr/bad_weak_ptr.hpp
+++ b/include/boost/smart_ptr/bad_weak_ptr.hpp
@@ -47,7 +47,7 @@ class bad_weak_ptr: public std::exception
 {
 public:
 
-    virtual char const * what() const BOOST_NOEXCEPT_OR_NOTHROW
+    virtual char const * what() const BOOST_NOEXCEPT_OR_NOTHROW BOOST_OVERRIDE
     {
         return "tr1::bad_weak_ptr";
     }
diff --git a/include/boost/smart_ptr/detail/local_counted_base.hpp b/include/boost/smart_ptr/detail/local_counted_base.hpp
index 405ef30..3914aa1 100644
--- a/include/boost/smart_ptr/detail/local_counted_base.hpp
+++ b/include/boost/smart_ptr/detail/local_counted_base.hpp
@@ -113,12 +113,12 @@ public:
 
 #endif
 
-    virtual void local_cb_destroy() BOOST_SP_NOEXCEPT
+    virtual void local_cb_destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         delete this;
     }
 
-    virtual boost::detail::shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT
+    virtual boost::detail::shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return pn_;
     }
@@ -130,12 +130,12 @@ public:
 
     shared_count pn_;
 
-    virtual void local_cb_destroy() BOOST_SP_NOEXCEPT
+    virtual void local_cb_destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         shared_count().swap( pn_ );
     }
 
-    virtual boost::detail::shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT
+    virtual boost::detail::shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return pn_;
     }
diff --git a/include/boost/smart_ptr/detail/sp_counted_impl.hpp b/include/boost/smart_ptr/detail/sp_counted_impl.hpp
index 96c9da3..23ea339 100644
--- a/include/boost/smart_ptr/detail/sp_counted_impl.hpp
+++ b/include/boost/smart_ptr/detail/sp_counted_impl.hpp
@@ -85,7 +85,7 @@ public:
 #endif
     }
 
-    virtual void dispose() BOOST_SP_NOEXCEPT
+    virtual void dispose() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         boost::sp_scalar_destructor_hook( px_, sizeof(X), this );
@@ -93,17 +93,17 @@ public:
         boost::checked_delete( px_ );
     }
 
-    virtual void * get_deleter( sp_typeinfo_ const & ) BOOST_SP_NOEXCEPT
+    virtual void * get_deleter( sp_typeinfo_ const & ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return 0;
     }
 
-    virtual void * get_local_deleter( sp_typeinfo_ const & ) BOOST_SP_NOEXCEPT
+    virtual void * get_local_deleter( sp_typeinfo_ const & ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return 0;
     }
 
-    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT
+    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return 0;
     }
@@ -168,22 +168,22 @@ public:
     {
     }
 
-    virtual void dispose() BOOST_SP_NOEXCEPT
+    virtual void dispose() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         del( ptr );
     }
 
-    virtual void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT
+    virtual void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return ti == BOOST_SP_TYPEID_(D)? &reinterpret_cast<char&>( del ): 0;
     }
 
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT
+    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return ti == BOOST_SP_TYPEID_(D)? boost::detail::get_local_deleter( boost::addressof( del ) ): 0;
     }
 
-    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT
+    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return &reinterpret_cast<char&>( del );
     }
diff --git a/include/boost/smart_ptr/enable_shared_from.hpp b/include/boost/smart_ptr/enable_shared_from.hpp
index db347e6..be88b30 100644
--- a/include/boost/smart_ptr/enable_shared_from.hpp
+++ b/include/boost/smart_ptr/enable_shared_from.hpp
@@ -3,7 +3,7 @@
 
 //  enable_shared_from.hpp
 //
-//  Copyright 2019 Peter Dimov
+//  Copyright 2019, 2020 Peter Dimov
 //
 //  Distributed under the Boost Software License, Version 1.0.
 //  See accompanying file LICENSE_1_0.txt or copy at
@@ -19,17 +19,21 @@ namespace boost
 
 class enable_shared_from: public enable_shared_from_this<enable_shared_from>
 {
+private:
+
+    using enable_shared_from_this<enable_shared_from>::shared_from_this;
+    using enable_shared_from_this<enable_shared_from>::weak_from_this;
 };
 
 
 template<class T> shared_ptr<T> shared_from( T * p )
 {
-    return shared_ptr<T>( p->enable_shared_from::shared_from_this(), p );
+    return shared_ptr<T>( p->enable_shared_from_this<enable_shared_from>::shared_from_this(), p );
 }
 
 template<class T> weak_ptr<T> weak_from( T * p ) BOOST_SP_NOEXCEPT
 {
-    return weak_ptr<T>( p->enable_shared_from::weak_from_this(), p );
+    return weak_ptr<T>( p->enable_shared_from_this<enable_shared_from>::weak_from_this(), p );
 }
 
 } // namespace boost
diff --git a/include/boost/smart_ptr/shared_ptr.hpp b/include/boost/smart_ptr/shared_ptr.hpp
index f54bdd7..6674b15 100644
--- a/include/boost/smart_ptr/shared_ptr.hpp
+++ b/include/boost/smart_ptr/shared_ptr.hpp
@@ -1175,6 +1175,13 @@ template<class D, class T> D const * basic_get_local_deleter( D const *, shared_
 
 } // namespace detail
 
+#if defined(__cpp_deduction_guides)
+
+template<class T> shared_ptr( weak_ptr<T> ) -> shared_ptr<T>;
+template<class T, class D> shared_ptr( std::unique_ptr<T, D> ) -> shared_ptr<T>;
+
+#endif
+
 } // namespace boost
 
 #if defined( BOOST_SP_DISABLE_DEPRECATED )
diff --git a/include/boost/smart_ptr/weak_ptr.hpp b/include/boost/smart_ptr/weak_ptr.hpp
index 5230f35..07ba189 100644
--- a/include/boost/smart_ptr/weak_ptr.hpp
+++ b/include/boost/smart_ptr/weak_ptr.hpp
@@ -264,6 +264,12 @@ template<class T> void swap(weak_ptr<T> & a, weak_ptr<T> & b) BOOST_SP_NOEXCEPT
     a.swap(b);
 }
 
+#if defined(__cpp_deduction_guides)
+
+template<class T> weak_ptr( shared_ptr<T> ) -> weak_ptr<T>;
+
+#endif
+
 } // namespace boost
 
 #endif  // #ifndef BOOST_SMART_PTR_WEAK_PTR_HPP_INCLUDED
diff --git a/test/Jamfile b/test/Jamfile
index f055d21..0d31010 100644
--- a/test/Jamfile
+++ b/test/Jamfile
@@ -352,3 +352,12 @@ run allocate_unique_noinit_test.cpp ;
 run allocate_unique_test.cpp ;
 run allocate_unique_throws_test.cpp ;
 run allocate_unique_value_test.cpp ;
+
+run sp_guides_test.cpp ;
+run sp_guides_test2.cpp ;
+run wp_guides_test.cpp ;
+
+compile-fail shared_from_fail.cpp ;
+compile-fail weak_from_fail.cpp ;
+
+compile sp_override_test.cpp ;
diff --git a/test/shared_from_fail.cpp b/test/shared_from_fail.cpp
new file mode 100644
index 0000000..5d670fa
--- /dev/null
+++ b/test/shared_from_fail.cpp
@@ -0,0 +1,22 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/shared_ptr.hpp>
+#include <boost/smart_ptr/enable_shared_from.hpp>
+
+struct X: public boost::enable_shared_from
+{
+};
+
+#if defined(__clang__) && defined(_MSC_VER)
+// clang-cl claims that it accepts this code for compatibility
+// with msvc, but no version of msvc accepts it
+#  pragma clang diagnostic error "-Wmicrosoft-using-decl"
+#endif
+
+int main()
+{
+    boost::shared_ptr<X> px( new X );
+    px->shared_from_this();
+}
diff --git a/test/sp_guides_test.cpp b/test/sp_guides_test.cpp
new file mode 100644
index 0000000..a7c6ff4
--- /dev/null
+++ b/test/sp_guides_test.cpp
@@ -0,0 +1,25 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(__cpp_deduction_guides)
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+
+int main()
+{
+    boost::shared_ptr<int> p1( new int );
+    boost::weak_ptr<int> p2( p1 );
+    boost::shared_ptr p3( p2 );
+}
+
+#else
+
+#include <boost/config/pragma_message.hpp>
+
+BOOST_PRAGMA_MESSAGE( "Skipping test because __cpp_deduction_guides is not defined" )
+
+int main() {}
+
+#endif
diff --git a/test/sp_guides_test2.cpp b/test/sp_guides_test2.cpp
new file mode 100644
index 0000000..e7ccfbc
--- /dev/null
+++ b/test/sp_guides_test2.cpp
@@ -0,0 +1,23 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(__cpp_deduction_guides)
+
+#include <boost/shared_ptr.hpp>
+#include <memory>
+
+int main()
+{
+    boost::shared_ptr p2( std::unique_ptr<int>( new int ) );
+}
+
+#else
+
+#include <boost/config/pragma_message.hpp>
+
+BOOST_PRAGMA_MESSAGE( "Skipping test because __cpp_deduction_guides is not defined" )
+
+int main() {}
+
+#endif
diff --git a/test/sp_override_test.cpp b/test/sp_override_test.cpp
new file mode 100644
index 0000000..8eb72dd
--- /dev/null
+++ b/test/sp_override_test.cpp
@@ -0,0 +1,18 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(__GNUC__) && __GNUC__ >= 5 && __cplusplus >= 201103L
+# pragma GCC diagnostic error "-Wsuggest-override"
+#endif
+
+#include <boost/smart_ptr.hpp>
+
+int main()
+{
+    boost::shared_ptr<int> p1( new int );
+    boost::shared_ptr<int[]> p2( new int[1] );
+
+    boost::make_shared<int>();
+    boost::make_shared<int[]>( 1 );
+}
diff --git a/test/weak_from_fail.cpp b/test/weak_from_fail.cpp
new file mode 100644
index 0000000..7503c3f
--- /dev/null
+++ b/test/weak_from_fail.cpp
@@ -0,0 +1,22 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/shared_ptr.hpp>
+#include <boost/smart_ptr/enable_shared_from.hpp>
+
+struct X: public boost::enable_shared_from
+{
+};
+
+#if defined(__clang__) && defined(_MSC_VER)
+// clang-cl claims that it accepts this code for compatibility
+// with msvc, but no version of msvc accepts it
+#  pragma clang diagnostic error "-Wmicrosoft-using-decl"
+#endif
+
+int main()
+{
+    boost::shared_ptr<X> px( new X );
+    px->weak_from_this();
+}
diff --git a/test/wp_guides_test.cpp b/test/wp_guides_test.cpp
new file mode 100644
index 0000000..92f95a0
--- /dev/null
+++ b/test/wp_guides_test.cpp
@@ -0,0 +1,24 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(__cpp_deduction_guides)
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+
+int main()
+{
+    boost::shared_ptr<int> p1( new int );
+    boost::weak_ptr p2( p1 );
+}
+
+#else
+
+#include <boost/config/pragma_message.hpp>
+
+BOOST_PRAGMA_MESSAGE( "Skipping test because __cpp_deduction_guides is not defined" )
+
+int main() {}
+
+#endif