diff --git a/include/boost/implicit_cast.hpp b/include/boost/implicit_cast.hpp
index 09e5f45..c134d71 100644
--- a/include/boost/implicit_cast.hpp
+++ b/include/boost/implicit_cast.hpp
@@ -11,6 +11,24 @@
 # pragma once
 #endif
 
+#include <boost/config/pragma_message.hpp>
+#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) || \
+    defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) || \
+    defined(BOOST_NO_CXX11_CONSTEXPR) || \
+    defined(BOOST_NO_CXX11_NULLPTR) || \
+    defined(BOOST_NO_CXX11_NOEXCEPT) || \
+    defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || \
+    defined(BOOST_NO_CXX11_FINAL) || \
+    defined(BOOST_NO_CXX11_ALIGNOF) || \
+    defined(BOOST_NO_CXX11_STATIC_ASSERT) || \
+    defined(BOOST_NO_CXX11_SMART_PTR) || \
+    defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST) || \
+    defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+
+BOOST_PRAGMA_MESSAGE("C++03 support is deprecated in Boost.Conversion 1.82 and will be removed in Boost.Conversion 1.84.")
+
+#endif
+
 namespace boost {
 
 namespace detail {
diff --git a/include/boost/polymorphic_cast.hpp b/include/boost/polymorphic_cast.hpp
index 3592506..798e93b 100644
--- a/include/boost/polymorphic_cast.hpp
+++ b/include/boost/polymorphic_cast.hpp
@@ -55,6 +55,24 @@
 #   pragma once
 #endif
 
+#include <boost/config/pragma_message.hpp>
+#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) || \
+    defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) || \
+    defined(BOOST_NO_CXX11_CONSTEXPR) || \
+    defined(BOOST_NO_CXX11_NULLPTR) || \
+    defined(BOOST_NO_CXX11_NOEXCEPT) || \
+    defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || \
+    defined(BOOST_NO_CXX11_FINAL) || \
+    defined(BOOST_NO_CXX11_ALIGNOF) || \
+    defined(BOOST_NO_CXX11_STATIC_ASSERT) || \
+    defined(BOOST_NO_CXX11_SMART_PTR) || \
+    defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST) || \
+    defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+
+BOOST_PRAGMA_MESSAGE("C++03 support is deprecated in Boost.Conversion 1.82 and will be removed in Boost.Conversion 1.84.")
+
+#endif
+
 # include <boost/assert.hpp>
 # include <boost/core/addressof.hpp>
 # include <boost/core/enable_if.hpp>
diff --git a/include/boost/polymorphic_pointer_cast.hpp b/include/boost/polymorphic_pointer_cast.hpp
index d0fef16..cbf6719 100644
--- a/include/boost/polymorphic_pointer_cast.hpp
+++ b/include/boost/polymorphic_pointer_cast.hpp
@@ -10,7 +10,11 @@
 #ifndef BOOST_CONVERSION_POLYMORPHIC_POINTER_CAST_HPP
 #define BOOST_CONVERSION_POLYMORPHIC_POINTER_CAST_HPP
 
-# include <boost/config.hpp>
+#include <boost/config.hpp>
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#   pragma once
+#endif
+
 # include <boost/assert.hpp>
 # include <boost/pointer_cast.hpp>
 # include <boost/throw_exception.hpp>
@@ -19,8 +23,22 @@
 #   include <boost/typeof/typeof.hpp>
 # endif
 
-#ifdef BOOST_HAS_PRAGMA_ONCE
-#   pragma once
+#include <boost/config/pragma_message.hpp>
+#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) || \
+    defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) || \
+    defined(BOOST_NO_CXX11_CONSTEXPR) || \
+    defined(BOOST_NO_CXX11_NULLPTR) || \
+    defined(BOOST_NO_CXX11_NOEXCEPT) || \
+    defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || \
+    defined(BOOST_NO_CXX11_FINAL) || \
+    defined(BOOST_NO_CXX11_ALIGNOF) || \
+    defined(BOOST_NO_CXX11_STATIC_ASSERT) || \
+    defined(BOOST_NO_CXX11_SMART_PTR) || \
+    defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST) || \
+    defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+
+BOOST_PRAGMA_MESSAGE("C++03 support is deprecated in Boost.Conversion 1.82 and will be removed in Boost.Conversion 1.84.")
+
 #endif
 
 namespace boost