diff --git a/include/wx/qt/private/treeitemdelegate.h b/include/wx/qt/private/treeitemdelegate.h
index 54463acdeb..a2fc222e02 100644
--- a/include/wx/qt/private/treeitemdelegate.h
+++ b/include/wx/qt/private/treeitemdelegate.h
@@ -40,7 +40,7 @@ public:
         m_textCtrl = NULL;
     }
 
-        void setModelData(QWidget *WXUNUSED(editor), QAbstractItemModel *WXUNUSED(model), const QModelIndex &WXUNUSED(index)) const wxOVERRIDE
+    void setModelData(QWidget *WXUNUSED(editor), QAbstractItemModel *WXUNUSED(model), const QModelIndex &WXUNUSED(index)) const wxOVERRIDE
     {
         // Don't set model data until wx has had a chance to send out events
     }