diff --git a/python/dnfdaemon/server/backend.py b/python/dnfdaemon/server/backend.py
index 7c1c1506575ec361de6c017c0ce5a3d1750af54d..997a46650e11243ec478a7424e899d3cae322042 100644
--- a/python/dnfdaemon/server/backend.py
+++ b/python/dnfdaemon/server/backend.py
@@ -433,7 +433,7 @@ class Progress(dnf.callback.DownloadProgress):
         self.dnl = {}
         self.last_frac = 0
 
-    def start(self, total_files, total_size):
+    def start(self, total_files, total_size, total_drpms=0):
         self.total_files = total_files
         self.total_size = float(total_size)
         self.download_files = 0