diff --git a/qutebrowser/utils/completion.py b/qutebrowser/utils/completion.py
index f944f1a77..7cd42b811 100644
--- a/qutebrowser/utils/completion.py
+++ b/qutebrowser/utils/completion.py
@@ -314,6 +314,10 @@ class CompletionFilterModel(QSortFilterProxyModel):
                 srcmodel.sort(sortcol)
             except NotImplementedError:
                 self.sort(sortcol)
+            # FIXME  we should call self.invalidate() here so sorting actually works.
+            # However, this seems to provoke a lot of weird problems, like
+            # random race condition segfaults :(
+            # self.invalidate()
 
     def filterAcceptsRow(self, row, parent):
         """Custom filter implementation.