diff --git a/qutebrowser/mainwindow/messageview.py b/qutebrowser/mainwindow/messageview.py
index 3a209720d..ea14265aa 100644
--- a/qutebrowser/mainwindow/messageview.py
+++ b/qutebrowser/mainwindow/messageview.py
@@ -78,7 +78,7 @@ class MessageView(QWidget):
 
     def __init__(self, parent=None):
         super().__init__(parent)
-        self._messages = []  # type: typing.Iterable[Message]
+        self._messages = []  # type: typing.MutableSequence[Message]
         self._vbox = QVBoxLayout(self)
         self._vbox.setContentsMargins(0, 0, 0, 0)
         self._vbox.setSpacing(0)