diff --git a/ocrscrape.py b/ocrscrape.py
index 2f2d6ed..7f3bcde 100644
--- a/ocrscrape.py
+++ b/ocrscrape.py
@@ -109,7 +109,7 @@ class OCRScraperWorker(threading.Thread):
             ocr = self._identify_ocr_data_from_url(ocr_str)
             # check if the file exists already
             do_download = False
-            filename = os.path.abspath(os.path.abspath(self.directory) + '/' + ocr.filename)
+            filename = os.path.abspath(os.path.abspath(self.directory) + os.sep + ocr.filename)
             if os.path.isfile(filename):
                 if self._file_checksum_matches(filename, ocr):
                     os.utime(filename, None)