diff --git a/src/ui/maplistmodels.cpp b/src/ui/maplistmodels.cpp
index b4f6e9dc..e3dfba14 100644
--- a/src/ui/maplistmodels.cpp
+++ b/src/ui/maplistmodels.cpp
@@ -20,6 +20,7 @@ void MapTree::removeSelected() {
 QWidget *GroupNameDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &, const QModelIndex &) const {
     QLineEdit *editor = new QLineEdit(parent);
     static const QRegularExpression expression("gMapGroup_[A-Za-z0-9_]+");
+    editor->setPlaceholderText("gMapGroup_");
     QRegularExpressionValidator *validator = new QRegularExpressionValidator(expression, parent);
     editor->setValidator(validator);
     editor->setFrame(false);