diff --git a/toml/parser.hpp b/toml/parser.hpp
index deeab7c..2339d9b 100644
--- a/toml/parser.hpp
+++ b/toml/parser.hpp
@@ -1074,7 +1074,13 @@ toml::Table parse(std::basic_istream<wchar_t, traits>& is)
     std::vector<wchar_t> contents(size);
     is.read(contents.data(), size);
     is.imbue(curloc);
-    return parse_data::invoke(contents.cbegin(), contents.cend());
+
+    std::wstring wstr(size, ' ');
+    std::copy(contents.cbegin(), contents.cend(), wstr.begin());
+    std::wstring_convert<std::convert_utf8<wchar_t>, wchar_t> cvter;
+    std::string u8str = converter.to_bytes(wstr);
+
+    return parse_data::invoke(u8str.cbegin(), u8str.cend());
 }
 
 toml::Table parse(const std::string& filename)