diff --git a/normalisename.py b/normalisename.py
index b942276..1e8cbb9 100644
--- a/normalisename.py
+++ b/normalisename.py
@@ -1,6 +1,8 @@
 from sys import argv
-from os import rename
 from unidecode import unidecode
+from os import rename
+from os.path import basename, dirname
+from os.path import join as joinpath
 
 
 # whitespaces will be replaced
@@ -9,12 +11,18 @@ from unidecode import unidecode
 # dashes are ok
 whitelist = [' ', '.', '_', '-']
 
-for file in argv[1:]:
-    rename(file,
+for path in argv[1:]:
+    dir = dirname(path)
+    file = basename(path)
+    rename(path,
            unidecode
            (
-               ''.join(ch for ch in file
-                       if ch.isalnum()
-                       or ch in whitelist)
+               joinpath
+               (
+                   dir,
+                   ''.join(ch for ch in file
+                           if ch.isalnum()
+                           or ch in whitelist)
+               )
            )
            .replace(' ', '_'))