diff --git a/src/common/platform/unicode.hpp b/src/common/platform/unicode.hpp
index ec20ba66..3171b9fa 100644
--- a/src/common/platform/unicode.hpp
+++ b/src/common/platform/unicode.hpp
@@ -25,4 +25,40 @@ inline std::string u16_to_u8(std::u16string_view u16_view) {
         }
     }
     return utf8_str;
-}
\ No newline at end of file
+}
+
+inline std::string w_to_u8(std::wstring_view w_view) {
+    std::string utf8_str;
+    utf8_str.reserve(w_view.size() * 2);
+    for (char16_t ch : w_view) {
+        if (ch <= 0x7F) {
+            utf8_str.push_back(static_cast<char>(ch));
+        } else if (ch <= 0x7FF) {
+            utf8_str.push_back(static_cast<char>(0xC0 | (ch >> 6)));
+            utf8_str.push_back(static_cast<char>(0x80 | (ch & 0x3F)));
+        } else {
+            utf8_str.push_back(static_cast<char>(0xE0 | (ch >> 12)));
+            utf8_str.push_back(static_cast<char>(0x80 | ((ch >> 6) & 0x3F)));
+            utf8_str.push_back(static_cast<char>(0x80 | (ch & 0x3F)));
+        }
+    }
+    return utf8_str;
+}
+
+#ifndef OS_WINDOWS
+    inline int open_unicode(FILE** handle, std::u16string fileName, std::u16string mode)
+    {
+        *handle = fopen(u16_to_u8(fileName).c_str(), u16_to_u8(mode).c_str());
+        return errno;
+    }
+#else
+    inline std::wstring u16_to_w(const std::u16string& u16str) {
+        return std::wstring(reinterpret_cast<const wchar_t*>(u16str.data()), u16str.size());
+    }
+
+    inline auto open_unicode(FILE** handle, std::u16string fileName, std::u16string mode)
+    {
+        return _wfopen_s(handle, u16_to_w(fileName).c_str(), u16_to_w(mode).c_str());
+    }
+#endif
+
diff --git a/src/windows-emulator/syscalls.cpp b/src/windows-emulator/syscalls.cpp
index 59d5dcaa..c43ec421 100644
--- a/src/windows-emulator/syscalls.cpp
+++ b/src/windows-emulator/syscalls.cpp
@@ -2158,9 +2158,8 @@ namespace
 		}
 
 		FILE* file{};
-		// TODO: fix unicode conversion
-		//const auto error = _wfopen_s(&file, f.name.c_str(), mode);
-		const auto error = EACCES;
+
+		const auto error = open_unicode(&file, f.name.c_str(), mode.c_str());
 
 		if (!file)
 		{