diff --git a/src/crypto/_elliptic_impl_pub.hpp b/src/crypto/_elliptic_impl_pub.hpp
index aa547be..b982ba1 100644
--- a/src/crypto/_elliptic_impl_pub.hpp
+++ b/src/crypto/_elliptic_impl_pub.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include <fc/crypto/elliptic.hpp>
+#include <boost/config.hpp>
 
 /* public_key_impl implementation based on openssl
  * used by mixed + openssl
@@ -12,21 +13,21 @@ void _init_lib();
 class public_key_impl
 {
     public:
-        public_key_impl() noexcept;
-        public_key_impl( const public_key_impl& cpy ) noexcept;
-        public_key_impl( public_key_impl&& cpy ) noexcept;
-        ~public_key_impl() noexcept;
+        public_key_impl() BOOST_NOEXCEPT;
+        public_key_impl( const public_key_impl& cpy ) BOOST_NOEXCEPT;
+        public_key_impl( public_key_impl&& cpy ) BOOST_NOEXCEPT;
+        ~public_key_impl() BOOST_NOEXCEPT;
 
-        public_key_impl& operator=( const public_key_impl& pk ) noexcept;
+        public_key_impl& operator=( const public_key_impl& pk ) BOOST_NOEXCEPT;
 
-        public_key_impl& operator=( public_key_impl&& pk ) noexcept;
+        public_key_impl& operator=( public_key_impl&& pk ) BOOST_NOEXCEPT;
 
         static int ECDSA_SIG_recover_key_GFp(EC_KEY *eckey, ECDSA_SIG *ecsig, const unsigned char *msg, int msglen, int recid, int check);
 
         EC_KEY* _key = nullptr;
 
     private:
-        void free_key() noexcept;
+        void free_key() BOOST_NOEXCEPT;
 };
 
 }}}
diff --git a/src/crypto/elliptic_impl_pub.cpp b/src/crypto/elliptic_impl_pub.cpp
index d3f0724..c9bbb08 100644
--- a/src/crypto/elliptic_impl_pub.cpp
+++ b/src/crypto/elliptic_impl_pub.cpp
@@ -1,4 +1,5 @@
 #include <fc/fwd_impl.hpp>
+#include <boost/config.hpp>
 
 #include "_elliptic_impl_pub.hpp"
 
@@ -7,29 +8,29 @@
 namespace fc { namespace ecc {
     namespace detail {
 
-        public_key_impl::public_key_impl() noexcept
+        public_key_impl::public_key_impl() BOOST_NOEXCEPT
         {
             _init_lib();
         }
 
-        public_key_impl::public_key_impl( const public_key_impl& cpy ) noexcept
+        public_key_impl::public_key_impl( const public_key_impl& cpy ) BOOST_NOEXCEPT
         {
             _init_lib();
             *this = cpy;
         }
 
-        public_key_impl::public_key_impl( public_key_impl&& cpy ) noexcept
+        public_key_impl::public_key_impl( public_key_impl&& cpy ) BOOST_NOEXCEPT
         {
             _init_lib();
             *this = cpy;
         }
 
-        public_key_impl::~public_key_impl() noexcept
+        public_key_impl::~public_key_impl() BOOST_NOEXCEPT
         {
             free_key();
         }
 
-        public_key_impl& public_key_impl::operator=( const public_key_impl& pk ) noexcept
+        public_key_impl& public_key_impl::operator=( const public_key_impl& pk ) BOOST_NOEXCEPT
         {
             if (pk._key == nullptr)
             {
@@ -42,7 +43,7 @@ namespace fc { namespace ecc {
             return *this;
         }
 
-        public_key_impl& public_key_impl::operator=( public_key_impl&& pk ) noexcept
+        public_key_impl& public_key_impl::operator=( public_key_impl&& pk ) BOOST_NOEXCEPT
         {
             if ( this != &pk ) {
                 free_key();
@@ -52,7 +53,7 @@ namespace fc { namespace ecc {
             return *this;
         }
 
-        void public_key_impl::free_key() noexcept
+        void public_key_impl::free_key() BOOST_NOEXCEPT
         {
             if( _key != nullptr )
             {
diff --git a/src/crypto/elliptic_openssl.cpp b/src/crypto/elliptic_openssl.cpp
index 2d22056..78170a7 100644
--- a/src/crypto/elliptic_openssl.cpp
+++ b/src/crypto/elliptic_openssl.cpp
@@ -21,29 +21,29 @@ namespace fc { namespace ecc {
         class private_key_impl
         {
             public:
-                private_key_impl() noexcept
+                private_key_impl() BOOST_NOEXCEPT
                 {
                     _init_lib();
                 }
 
-                private_key_impl( const private_key_impl& cpy ) noexcept
+                private_key_impl( const private_key_impl& cpy ) BOOST_NOEXCEPT
                 {
                     _init_lib();
                     *this = cpy;
                 }
 
-                private_key_impl( private_key_impl&& cpy ) noexcept
+                private_key_impl( private_key_impl&& cpy ) BOOST_NOEXCEPT
                 {
                     _init_lib();
                     *this = cpy;
                 }
 
-                ~private_key_impl() noexcept
+                ~private_key_impl() BOOST_NOEXCEPT
                 {
                     free_key();
                 }
 
-                private_key_impl& operator=( const private_key_impl& pk ) noexcept
+                private_key_impl& operator=( const private_key_impl& pk ) BOOST_NOEXCEPT
                 {
                     if (pk._key == nullptr)
                     {
@@ -56,7 +56,7 @@ namespace fc { namespace ecc {
                     return *this;
                 }
 
-                private_key_impl& operator=( private_key_impl&& pk ) noexcept
+                private_key_impl& operator=( private_key_impl&& pk ) BOOST_NOEXCEPT
                 {
                     if ( this != &pk ) {
                         free_key();
@@ -69,7 +69,7 @@ namespace fc { namespace ecc {
                 EC_KEY* _key = nullptr;
 
             private:
-                void free_key() noexcept
+                void free_key() BOOST_NOEXCEPT
                 {
                     if( _key != nullptr )
                     {