diff --git a/docs/config.rst b/docs/config.rst
index 0ec8695..454074a 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -408,6 +408,7 @@ Local
       fileext = "..."
       #encoding = "utf-8"
       #post_hook = null
+      #fileextignore = ".tmp"
 
     Can be used with `khal <http://lostpackets.de/khal/>`_. See :doc:`vdir` for
     a more formal description of the format.
@@ -426,6 +427,8 @@ Local
     :param post_hook: A command to call for each item creation and
         modification. The command will be called with the path of the
         new/updated file.
+    :param fileextignore: The file extention to ignore,
+        the default is ``.tmp``.
 
 .. storage:: singlefile
 
diff --git a/vdirsyncer/storage/filesystem.py b/vdirsyncer/storage/filesystem.py
index 1e47ba1..1fd1ac6 100644
--- a/vdirsyncer/storage/filesystem.py
+++ b/vdirsyncer/storage/filesystem.py
@@ -22,13 +22,15 @@ class FilesystemStorage(Storage):
     storage_name = "filesystem"
     _repr_attributes = ("path",)
 
-    def __init__(self, path, fileext, encoding="utf-8", post_hook=None, **kwargs):
+    def __init__(self, path, fileext,
+                 encoding="utf-8", post_hook=None, fileignoreext=".tmp", **kwargs):
         super().__init__(**kwargs)
         path = expand_path(path)
         checkdir(path, create=False)
         self.path = path
         self.encoding = encoding
         self.fileext = fileext
+        self.fileignoreext = fileignoreext
         self.post_hook = post_hook
 
     @classmethod
@@ -81,7 +83,7 @@ class FilesystemStorage(Storage):
         for fname in os.listdir(self.path):
             fpath = os.path.join(self.path, fname)
             if os.path.isfile(fpath) and fname.endswith(self.fileext) and (
-                    not fname.endswith('.tmp')):
+                    not fname.endswith(self.fileignoreext)):
                 yield fname, get_etag_from_file(fpath)
 
     def get(self, href):