diff --git a/src/calibre/devices/kindle/driver.py b/src/calibre/devices/kindle/driver.py
index d4cbb5b90b..8ef1ba6b9b 100755
--- a/src/calibre/devices/kindle/driver.py
+++ b/src/calibre/devices/kindle/driver.py
@@ -27,6 +27,7 @@ class KINDLE(USBMS):
     STORAGE_CARD_VOLUME_LABEL = 'Kindle Storage Card'
     
     EBOOK_DIR_MAIN = "documents"
+    EBOOK_DIR_CARD = "documents"
     SUPPORTS_SUB_DIRS = True
 
     def delete_books(self, paths, end_session=True):