diff --git a/src/parser/stream.cpp b/src/parser/stream.cpp
index 00395f59ff25..8f385fb8965a 100644
--- a/src/parser/stream.cpp
+++ b/src/parser/stream.cpp
@@ -147,6 +147,14 @@ std::tuple<std::string_view, size_t, size_t> find_line_with_offset(std::string_v
     return std::make_tuple(line, line_num, offset_on_line);
 }
 
+#ifdef _WIN32
+std::wstring to_wstring(std::string_view s)
+{
+    std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> conversion;
+    return conversion.from_bytes(s.data(), s.data() + s.size());
+}
+#endif
+
 } // anonymous namespace
 
 struct file_content::impl
@@ -162,8 +170,13 @@ struct file_content::impl
     impl() : content_size(0), content(nullptr) {}
 
     impl(std::string_view filepath) :
+#ifdef _WIN32
+        content_size(fs::file_size(to_wstring(filepath))),
+        mapped_file(to_wstring(filepath).c_str(), bip::read_only),
+#else
         content_size(fs::file_size(std::string{filepath}.c_str())),
         mapped_file(std::string{filepath}.c_str(), bip::read_only),
+#endif
         mapped_region(mapped_file, bip::read_only, 0, content_size),
         content(nullptr)
     {