diff --git a/src/lib/io/Filesystem.cpp b/src/lib/io/Filesystem.cpp
index 96d4328b0..96beea197 100644
--- a/src/lib/io/Filesystem.cpp
+++ b/src/lib/io/Filesystem.cpp
@@ -7,34 +7,8 @@
 
 #include "Filesystem.h"
 
-#include <fstream>
-
 namespace deskflow {
 
-namespace {
-
-template <class Stream> void openUtf8PathImpl(Stream &stream, const fs::path &path, std::ios_base::openmode mode)
-{
-  stream.open(path.native().c_str(), mode);
-}
-
-} // namespace
-
-void openUtf8Path(std::ifstream &stream, const fs::path &path, std::ios_base::openmode mode)
-{
-  openUtf8PathImpl(stream, path, mode);
-}
-
-void openUtf8Path(std::ofstream &stream, const fs::path &path, std::ios_base::openmode mode)
-{
-  openUtf8PathImpl(stream, path, mode);
-}
-
-void openUtf8Path(std::fstream &stream, const fs::path &path, std::ios_base::openmode mode)
-{
-  openUtf8PathImpl(stream, path, mode);
-}
-
 std::FILE *fopenUtf8Path(const fs::path &path, const std::string &mode)
 {
 #if SYSAPI_WIN32
diff --git a/src/lib/io/Filesystem.h b/src/lib/io/Filesystem.h
index 96ddecff2..502562eec 100644
--- a/src/lib/io/Filesystem.h
+++ b/src/lib/io/Filesystem.h
@@ -9,19 +9,11 @@
 
 #include <cstdio>
 #include <filesystem>
-#include <ios>
-#include <iosfwd>
 
 namespace deskflow {
 
 namespace fs = std::filesystem;
 
-void openUtf8Path(std::ifstream &stream, const fs::path &path, std::ios_base::openmode mode = std::ios_base::in);
-void openUtf8Path(std::ofstream &stream, const fs::path &path, std::ios_base::openmode mode = std::ios_base::out);
-void openUtf8Path(
-    std::fstream &stream, const fs::path &path, std::ios_base::openmode mode = std::ios_base::in | std::ios_base::out
-);
-
 std::FILE *fopenUtf8Path(const fs::path &path, const std::string &mode);
 
 } // namespace deskflow