diff --git a/src/calibre/srv/utils.py b/src/calibre/srv/utils.py
index 9af4b17e58..adfa147131 100644
--- a/src/calibre/srv/utils.py
+++ b/src/calibre/srv/utils.py
@@ -391,6 +391,8 @@ class RotatingStream(object):
                 os.remove(f)
             except EnvironmentError as e:
                 failed[f] = e
+        self.set_output()
+        return failed
 
 
 class RotatingLog(ServerLog):