diff --git a/include/boost/process/v2/detail/utf8.hpp b/include/boost/process/v2/detail/utf8.hpp
index 86add628d..a31cdff4d 100644
--- a/include/boost/process/v2/detail/utf8.hpp
+++ b/include/boost/process/v2/detail/utf8.hpp
@@ -23,8 +23,7 @@ BOOST_PROCESS_V2_DECL std::size_t convert_to_wide(const  char   * in, std::size_
 
 template<typename CharOut, typename Traits = std::char_traits<CharOut>, 
          typename Allocator = std::allocator<CharOut>, typename CharIn,
-         typename = typename std::enable_if<std::is_same<CharOut, CharIn>::value>::type>
-BOOST_PROCESS_V2_DECL 
+         typename = typename std::enable_if<std::is_same<CharOut, CharIn>::value>::type> 
 std::basic_string<CharOut, Traits, Allocator> conv_string(
     const CharIn * data, std::size_t size, 
     const Allocator allocator = Allocator{})
@@ -35,8 +34,7 @@ std::basic_string<CharOut, Traits, Allocator> conv_string(
 
 template<typename CharOut, typename Traits = std::char_traits<CharOut>, 
          typename Allocator = std::allocator<CharOut>,
-         typename = typename std::enable_if<std::is_same<CharOut, char>::value>::type>
-BOOST_PROCESS_V2_DECL 
+         typename = typename std::enable_if<std::is_same<CharOut, char>::value>::type> 
 std::basic_string<CharOut, Traits, Allocator> conv_string(
     const wchar_t * data, std::size_t size, 
     const Allocator allocator = Allocator{})
@@ -59,8 +57,7 @@ std::basic_string<CharOut, Traits, Allocator> conv_string(
 
 template<typename CharOut, typename Traits = std::char_traits<CharOut>, 
          typename Allocator = std::allocator<CharOut>,
-         typename = typename std::enable_if<std::is_same<CharOut, wchar_t>::value>::type>
-BOOST_PROCESS_V2_DECL 
+         typename = typename std::enable_if<std::is_same<CharOut, wchar_t>::value>::type> 
 std::basic_string<CharOut, Traits, Allocator> conv_string(
     const char * data, std::size_t size, 
     const Allocator allocator = Allocator{})