diff --git a/headphones/postprocessor.py b/headphones/postprocessor.py
index 056e4f64..4a2784f5 100644
--- a/headphones/postprocessor.py
+++ b/headphones/postprocessor.py
@@ -637,7 +637,7 @@ def moveFiles(albumpath, release, tracks):
         sortname = release['ArtistName']
 
     if sortname[0].isdigit():
-        firstchar = '0-9'
+        firstchar = u'0-9'
     else:
         firstchar = sortname[0]