diff --git a/src/borg/platform/base.py b/src/borg/platform/base.py
index 38328a50b..7056da060 100644
--- a/src/borg/platform/base.py
+++ b/src/borg/platform/base.py
@@ -2,6 +2,7 @@ import errno
 import os
 import socket
 import uuid
+from pathlib import Path
 
 from ..helpers import safe_unlink
 from ..platformflags import is_win32
@@ -102,7 +103,7 @@ def sync_dir(path):
         # Opening directories is not supported on windows.
         # TODO: do we need to handle this in some other way?
         return
-    fd = os.open(path, os.O_RDONLY)
+    fd = os.open(str(path), os.O_RDONLY)
     try:
         os.fsync(fd)
     except OSError as os_error:
@@ -164,7 +165,7 @@ class SyncFile:
         mode = "xb" if binary else "x"  # x -> raise FileExists exception in open() if file exists already
         self.path = path
         if fd is None:
-            self.f = open(path, mode=mode)  # python file object
+            self.f = open(str(path), mode=mode)  # python file object
         else:
             self.f = os.fdopen(fd, mode=mode)
         self.fd = self.f.fileno()  # OS-level fd
@@ -197,7 +198,7 @@ class SyncFile:
 
         dirname = None
         try:
-            dirname = os.path.dirname(self.path)
+            dirname = Path(self.path).parent
             self.sync()
         finally:
             self.f.close()
@@ -225,8 +226,9 @@ class SaveFile:
     def __init__(self, path, binary=False):
         self.binary = binary
         self.path = path
-        self.dir = os.path.dirname(path)
-        self.tmp_prefix = os.path.basename(path) + "-"
+        path_obj = Path(path)
+        self.dir = str(path_obj.parent)
+        self.tmp_prefix = path_obj.name + "-"
         self.tmp_fd = None  # OS-level fd
         self.tmp_fname = None  # full path/filename corresponding to self.tmp_fd
         self.f = None  # python-file-like SyncFile