diff --git a/src/dcow/thumbnails.py b/src/dcow/thumbnails.py
index a09c395..17df876 100644
--- a/src/dcow/thumbnails.py
+++ b/src/dcow/thumbnails.py
@@ -3,6 +3,10 @@ from milla import controllers
 import milla
 import os
 import webob.static
+import sys
+
+
+fs_encoding = sys.getfilesystemencoding()
 
 
 class ThumbnailController(milla.controllers.HTTPVerbController):
@@ -11,6 +15,7 @@ class ThumbnailController(milla.controllers.HTTPVerbController):
     THUMB_SIZE = (262, 148)
 
     def GET(self, request, image):
+        image = image.encode('latin-1').decode(fs_encoding)
         thumb_dir = request.config['gallery.thumbnail_dir']
         image_dir = request.config['gallery.screenshot_dir']
         screenshot = os.path.join(image_dir, image)