diff --git a/src/calibre/devices/kobo/driver.py b/src/calibre/devices/kobo/driver.py
index 6f70510ac8..b2c2526eeb 100644
--- a/src/calibre/devices/kobo/driver.py
+++ b/src/calibre/devices/kobo/driver.py
@@ -1036,7 +1036,7 @@ class KOBO(USBMS):
         them as much grief as it does me :-)
 
         This has to make a temporary copy of the book files with a
-        epub extension to allow Calibre's normal processing to
+        epub extension to allow calibre's normal processing to
         deal with the file appropriately
         '''
         for idx, path in enumerate(paths):