diff --git a/src/calibre/devices/kindle/driver.py b/src/calibre/devices/kindle/driver.py
index 8c62da7587..1052ab87a0 100644
--- a/src/calibre/devices/kindle/driver.py
+++ b/src/calibre/devices/kindle/driver.py
@@ -79,6 +79,7 @@ class KINDLE_DX(KINDLE):
     author         = _('John Schember')
     supported_platforms = ['windows', 'osx', 'linux']
 
+    FORMATS     = ['azw', 'mobi', 'prc', 'azw1', 'tpz', 'pdf', 'txt']
 
     PRODUCT_ID = [0x0003]
     BCD        = [0x0100]