diff --git a/qutebrowser/test/utils/test_url.py b/qutebrowser/test/utils/test_url.py
index 2dd858f78..e960b4bc4 100644
--- a/qutebrowser/test/utils/test_url.py
+++ b/qutebrowser/test/utils/test_url.py
@@ -126,6 +126,7 @@ class IsUrlTests(unittest.TestCase):
         'http://foobar',
         'localhost:8080',
         'qutebrowser.org',
+        ' qutebrowser.org ',
         '127.0.0.1',
         '::1',
         '2001:41d0:2:6c11::1',
diff --git a/qutebrowser/utils/urlutils.py b/qutebrowser/utils/urlutils.py
index 21ffb6a30..5019f8e22 100644
--- a/qutebrowser/utils/urlutils.py
+++ b/qutebrowser/utils/urlutils.py
@@ -193,6 +193,8 @@ def is_url(urlstr):
 
     log.url.debug("Checking if '{}' is a URL (autosearch={}).".format(
                   urlstr, autosearch))
+
+    url = urlstr.strip()
     qurl = QUrl(urlstr)
 
     if not autosearch: