diff --git a/src/view/grid/TabDelegate.cpp b/src/view/grid/TabDelegate.cpp
index 44abac6..5a57d00 100644
--- a/src/view/grid/TabDelegate.cpp
+++ b/src/view/grid/TabDelegate.cpp
@@ -38,7 +38,8 @@ void TabDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
     QLineEdit *line = qobject_cast<QLineEdit *>(editor);
     QString value = line->text().trimmed();
 
-    if ((*_operations)[index.row()].parent)
+    if (index.row() < _operations->size() && (*_operations)[index.row()].id && 
+	(*_operations)[index.row()].parent)
 	model->setData(index, qVariantFromValue("    " + value));
     else
 	model->setData(index, qVariantFromValue(value));