diff --git a/src/calibre/devices/prs505/driver.py b/src/calibre/devices/prs505/driver.py
index 6f8f9de6df..fc72469c71 100644
--- a/src/calibre/devices/prs505/driver.py
+++ b/src/calibre/devices/prs505/driver.py
@@ -66,7 +66,6 @@ class PRS505(USBMS):
         return '_LAUNCHER' in pnp_id
 
     def open(self):
-        self.report_progress = lambda x, y: x
         USBMS.open(self)
 
         def write_cache(prefix):