diff -r cef43609a374 -r 0133e565e072 src/mainwindow.cpp
--- a/src/mainwindow.cpp	Sat Dec 14 23:00:01 2019 +0200
+++ b/src/mainwindow.cpp	Wed Jan 01 17:45:56 2020 +0200
@@ -117,7 +117,7 @@
 
 void MainWindow::openModelForEditing(const QString& modelName)
 {
-	Document* document = new Document{this->documents.findModelByName(modelName)};
+	Document* document = new Document{this->documents.findModelByName(modelName), &this->documents};
 	this->ui->tabs->addTab(document, modelName);
 	this->ui->tabs->setCurrentWidget(document);
 	document->restoreSplitterState(this->documentSplitterState);