diff --git a/qutebrowser/commands.py b/qutebrowser/commands.py
index a6cb7c6ab..8dad2cf50 100644
--- a/qutebrowser/commands.py
+++ b/qutebrowser/commands.py
@@ -47,7 +47,7 @@ class Command(QObject):
                       (self.nargs == '+' and len(argv) < 1)):
             raise TypeError("Invalid argument count!")
 
-    def run(self, argv):
+    def run(self, argv=None):
         if not self.signal:
             raise NotImplementedError
         self.signal.emit()
diff --git a/qutebrowser/keys.py b/qutebrowser/keys.py
index 783233d8d..061cf5260 100644
--- a/qutebrowser/keys.py
+++ b/qutebrowser/keys.py
@@ -21,4 +21,4 @@ class KeyParser(QObject):
         if cmd.nargs and cmd.nargs != 0:
             self.set_cmd_text.emit(':{} '.format(cmd.name))
         else:
-            cmd.run([])
+            cmd.run()