diff --git a/retroshare-gui/src/gui/gxsforums/GxsForumThreadWidget.cpp b/retroshare-gui/src/gui/gxsforums/GxsForumThreadWidget.cpp
index 457766fc0..d03f93ca0 100644
--- a/retroshare-gui/src/gui/gxsforums/GxsForumThreadWidget.cpp
+++ b/retroshare-gui/src/gui/gxsforums/GxsForumThreadWidget.cpp
@@ -257,6 +257,7 @@ GxsForumThreadWidget::GxsForumThreadWidget(const RsGxsGroupId &forumId, QWidget
     mThreadModel = new RsGxsForumModel(this);
     mThreadProxyModel = new ForumPostSortFilterProxyModel(ui->threadTreeWidget->header(),this);
     mThreadProxyModel->setSourceModel(mThreadModel);
+    mThreadProxyModel->setDynamicSortFilter(false);	// causes crashes when true.
     mThreadProxyModel->setSortRole(RsGxsForumModel::SortRole);
     ui->threadTreeWidget->setModel(mThreadProxyModel);