diff --git a/youtube-dl b/youtube-dl
index 5e98dfde4..ea4b3fded 100755
--- a/youtube-dl
+++ b/youtube-dl
@@ -99,7 +99,7 @@ def sanitize_open(filename, open_mode):
 		return (stream, filename)
 	except (IOError, OSError), err:
 		# In case of error, try to remove win32 forbidden chars
-		filename = re.sub(ur'[<>:"\|\?\*]', u'#', filename)
+		filename = re.sub(ur'[/<>:"\|\?\*]', u'#', filename)
 
 		# An exception here should be caught in the caller
 		stream = open(filename, open_mode)