1 files changed, 2 insertions, 0 deletions
diff --git a/tools/designer/src/components/signalsloteditor/signalsloteditorwindow.h b/tools/designer/src/components/signalsloteditor/signalsloteditorwindow.h
index 9315955989..665f0b73ae 100644
--- a/tools/designer/src/components/signalsloteditor/signalsloteditorwindow.h
+++ b/tools/designer/src/components/signalsloteditor/signalsloteditorwindow.h
@@ -50,6 +50,7 @@ QT_BEGIN_NAMESPACE
 class QDesignerFormWindowInterface;
 class QDesignerFormEditorInterface;
 class QModelIndex;
+class QSortFilterProxyModel;
 class QTreeView;
 class QToolButton;
 
@@ -84,6 +85,7 @@ private:
     QToolButton *m_add_button, *m_remove_button;
     QDesignerFormEditorInterface *m_core;
     ConnectionModel *m_model;
+    QSortFilterProxyModel *m_proxy_model;
     bool m_handling_selection_change;
 };