diff --git a/src/siadrive_api/filepath.cpp b/src/siadrive_api/filepath.cpp
index 6562983..20bcab0 100644
--- a/src/siadrive_api/filepath.cpp
+++ b/src/siadrive_api/filepath.cpp
@@ -9,10 +9,11 @@ SString FilePath::FinalizePath(const SString& path)
 {
 #ifdef _WIN32
   std::wregex r(L"/+");
-  return std::regex_replace(path.str(), r, L"\\");
+  SString str = std::regex_replace(path.str(), r, L"\\");
+  std::wregex r2(L"\\\\+");
+  return std::regex_replace(str.str(), r2, L"\\\\");
 #else
-  std::wregex r(L"\\+");
-  return std::regex_replace(path.str(), r, L"/");
+  a
 #endif
 }
 
@@ -92,13 +93,13 @@ const SString FilePath::DirSep = "/";
 
 FilePath& FilePath::Append(const FilePath& filePath)
 {
-  _path += (DirSep + filePath);
+  _path = FinalizePath(_path + DirSep + filePath);
   return *this;
 }
 
 FilePath& FilePath::Append(const SString& path)
 {
-  _path += (DirSep + FinalizePath(path));
+  _path = FinalizePath(_path + DirSep + path);
   return *this;
 }