diff --git a/src/Gui/Dialogs/DlgAddProperty.cpp b/src/Gui/Dialogs/DlgAddProperty.cpp
index 1859fe2d66..eb2a63b5f8 100644
--- a/src/Gui/Dialogs/DlgAddProperty.cpp
+++ b/src/Gui/Dialogs/DlgAddProperty.cpp
@@ -335,7 +335,7 @@ void DlgAddProperty::initializeTypes()
 
 
     const auto addSeparator = [this]() {
-        ui->comboBoxType->addItem("──────────────────────");
+        ui->comboBoxType->addItem(QStringLiteral("──────────────────────"));
         const int idx = ui->comboBoxType->count() - 1;
         ui->comboBoxType->setItemData(idx, true, TypeItemModel::SeparatorRole);
     };