diff --git a/src/calibre/devices/prs505/books.py b/src/calibre/devices/prs505/books.py
index 82bc977bcd..ba3605530e 100644
--- a/src/calibre/devices/prs505/books.py
+++ b/src/calibre/devices/prs505/books.py
@@ -110,7 +110,7 @@ class BookList(_BookList):
                     return child
         return None
 
-    def add_book(self, book, collections):
+    def add_book(self, book, collections=None):
         if book in self:
             return
         """ Add a node into the DOM tree, representing a book """
@@ -267,6 +267,11 @@ class BookList(_BookList):
                 pli.parentNode.removeChild(pli)
                 pli.unlink()
 
+    def set_tags(self, book, tags):
+        tags = [t for t in tags if t]
+        book.tags = tags
+        self.set_playlists(book.id, tags)
+
     def set_playlists(self, id, collections):
         self.remove_from_playlists(id)
         for collection in set(collections):
diff --git a/src/calibre/devices/prs505/driver.py b/src/calibre/devices/prs505/driver.py
index 3e1ee67faa..0b41894a18 100644
--- a/src/calibre/devices/prs505/driver.py
+++ b/src/calibre/devices/prs505/driver.py
@@ -77,7 +77,6 @@ class PRS505(USBMS):
         return fname
 
     def sync_booklists(self, booklists, end_session=True):
-        print 'in sync_booklists'
         fix_ids(*booklists)
         if not os.path.exists(self._main_prefix):
             os.makedirs(self._main_prefix)