diff --git a/include/boost/system/error_code.hpp b/include/boost/system/error_code.hpp
index 684cd47..f5a4918 100644
--- a/include/boost/system/error_code.hpp
+++ b/include/boost/system/error_code.hpp
@@ -483,7 +483,7 @@ public:
 
 #if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
 
-    operator std::error_condition () const BOOST_NOEXCEPT
+    operator std::error_condition () const
     {
         return std::error_condition( value(), category() );
     }
@@ -610,7 +610,7 @@ public:
 
 #if defined(BOOST_SYSTEM_HAS_SYSTEM_ERROR)
 
-    operator std::error_code () const BOOST_NOEXCEPT
+    operator std::error_code () const
     {
         return std::error_code( value(), category() );
     }