diff --git a/linkcheck/gui/logger.py b/linkcheck/gui/logger.py
index c9320eef..6cbab1a0 100644
--- a/linkcheck/gui/logger.py
+++ b/linkcheck/gui/logger.py
@@ -55,7 +55,7 @@ class SignalLogger (_Logger):
         """Emit URL data which gets logged in the main window."""
         self.log_url_signal.emit(url_data)
 
-    def end_output (self, downloaded_bytes=None):
+    def end_output (self, downloaded_bytes=None, num_urls=None):
         """Emit statistic data which gets logged in the main window."""
         self.stats.downloaded_bytes = downloaded_bytes
         self.log_stats_signal.emit(self.stats)