diff --git a/qutebrowser/browser/qutescheme.py b/qutebrowser/browser/qutescheme.py
index f12ef529a..9771f6db1 100644
--- a/qutebrowser/browser/qutescheme.py
+++ b/qutebrowser/browser/qutescheme.py
@@ -29,6 +29,7 @@ import os
 import time
 import textwrap
 import mimetypes
+import urllib
 
 import pkg_resources
 from PyQt5.QtCore import QUrlQuery, QUrl
@@ -431,8 +432,9 @@ def qute_back(url):
 
     Simple page to free ram / lazy load a site, goes back on focusing the tab.
     """
-    html = jinja.render('back.html',
-                        title='Suspended: ' + url.fragment())
+    html = jinja.render(
+            'back.html',
+            title='Suspended: ' + urllib.parse.unquote(url.fragment()))
     return 'text/html', html
 
 
diff --git a/qutebrowser/misc/sessions.py b/qutebrowser/misc/sessions.py
index 64d170dab..1b0106f1b 100644
--- a/qutebrowser/misc/sessions.py
+++ b/qutebrowser/misc/sessions.py
@@ -22,6 +22,7 @@
 import os
 import os.path
 import itertools
+import urllib
 
 import sip
 from PyQt5.QtCore import QUrl, QObject, QPoint, QTimer
@@ -372,7 +373,9 @@ class SessionManager(QObject):
                 lazy_index = i + 1
                 lazy_load.append({
                     'title': histentry['title'],
-                    'url': 'qute://back#' + histentry['title'],
+                    'url':
+                        'qute://back#' +
+                        urllib.parse.quote(histentry['title']),
                     'active': True
                 })
                 histentry['active'] = False