diff --git a/src/calibre/devices/misc.py b/src/calibre/devices/misc.py
index 2a2d070ee6..d27348a1c6 100644
--- a/src/calibre/devices/misc.py
+++ b/src/calibre/devices/misc.py
@@ -573,7 +573,7 @@ class CERVANTES(USBMS):
     supported_platforms = ['windows', 'osx', 'linux']
     FORMATS = ['epub', 'fb2', 'mobi', 'doc', 'rtf', 'pdf', 'txt']
     VENDOR_ID   = [0x2a47]
-    PRODUCT_ID  = [0xad78, 0xad77, 0xad75]
+    PRODUCT_ID  = [0xad79, 0xad78, 0xad77, 0xad75]
     BCD         = [0x0110]
 
     EBOOK_DIR_MAIN = 'Books'