diff --git a/streambot.py b/streambot.py
index 376d19b..6221f45 100644
--- a/streambot.py
+++ b/streambot.py
@@ -72,7 +72,7 @@ class ArchivistBot(ClientXMPP):
 			filename = os.path.basename(msg['oob']['url'])
 			targetDir = self.datadir
 			if not os.path.exists(targetDir):
-				os.mkdir( targetDir, 0755 )
+				os.mkdir( targetDir, '0755' )
 
 			targetFile = os.path.join(targetDir, filename)