diff --git a/qutebrowser/browser/downloads.py b/qutebrowser/browser/downloads.py
index 6ac4cabb2..96c960f52 100644
--- a/qutebrowser/browser/downloads.py
+++ b/qutebrowser/browser/downloads.py
@@ -1245,4 +1245,4 @@ class DownloadManager(QAbstractListModel):
         Return:
             The number of unfinished downloads.
         """
-        return len([1 for download in self.downloads if not download.done])
+        return sum(1 for download in self.downloads if not download.done)