From 7b2ea64d43bcce5281ea270b6f68a3e2c28dfe93 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 20 Apr 2011 14:11:48 -0600
Subject: [PATCH] ...

---
 src/calibre/constants.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/constants.py b/src/calibre/constants.py
index a15ffbf967..e673f8878a 100644
--- a/src/calibre/constants.py
+++ b/src/calibre/constants.py
@@ -75,7 +75,7 @@ class Plugins(collections.Mapping):
         if iswindows:
             plugins.append('winutil')
         if isosx:
-            plugins.append(['usbobserver'])
+            plugins.append('usbobserver')
         self.plugins = frozenset(plugins)
 
     def load_plugin(self, name):