diff --git a/qutebrowser/mainwindow/tabbedbrowser.py b/qutebrowser/mainwindow/tabbedbrowser.py
index 26fd08923..4d24b3960 100644
--- a/qutebrowser/mainwindow/tabbedbrowser.py
+++ b/qutebrowser/mainwindow/tabbedbrowser.py
@@ -173,7 +173,7 @@ class TabbedBrowser(tabwidget.TabWidget):
         else:
             scroll_pos = '{:2}%'.format(y)
 
-        fields['scroll_pos'] = str(scroll_pos)
+        fields['scroll_pos'] = scroll_pos
         fmt = config.get('ui', 'window-title-format')
         self.window().setWindowTitle(fmt.format(**fields))
 
diff --git a/qutebrowser/mainwindow/tabwidget.py b/qutebrowser/mainwindow/tabwidget.py
index 50b7c7dd4..c000d7342 100644
--- a/qutebrowser/mainwindow/tabwidget.py
+++ b/qutebrowser/mainwindow/tabwidget.py
@@ -120,7 +120,7 @@ class TabWidget(QTabWidget):
         else:
             scroll_pos = '{:2}%'.format(y)
 
-        fields['scroll_pos'] = str(scroll_pos)
+        fields['scroll_pos'] = scroll_pos
 
         fmt = config.get('tabs', 'title-format')
         self.tabBar().setTabText(idx, fmt.format(**fields))