diff --git a/src/frontends/qt4/GuiApplication.cpp b/src/frontends/qt4/GuiApplication.cpp
index 8aba46e82e..375f0a7307 100644
--- a/src/frontends/qt4/GuiApplication.cpp
+++ b/src/frontends/qt4/GuiApplication.cpp
@@ -475,7 +475,7 @@ QAbstractItemModel * GuiApplication::languageModel()
 		lang_model->setData(item, toqstr(it->second.lang()), Qt::UserRole);
 	}
 	language_model_ = new QSortFilterProxyModel(this);
-    language_model_->setSourceModel(lang_model);
+	language_model_->setSourceModel(lang_model);
 	language_model_->setSortLocaleAware(true);
 	return language_model_;
 }