diff --git a/src/widgets/FunctionsWidget.cpp b/src/widgets/FunctionsWidget.cpp
index fc10c3c58..9fc009ec8 100644
--- a/src/widgets/FunctionsWidget.cpp
+++ b/src/widgets/FunctionsWidget.cpp
@@ -504,6 +504,7 @@ FunctionsWidget::FunctionsWidget(MainWindow *main)
     setModels(functionProxyModel);
     ui->treeView->sortByColumn(FunctionModel::NameColumn, Qt::AscendingOrder);
     ui->treeView->setExpandsOnDoubleClick(false);
+    ui->treeView->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 
     titleContextMenu = new QMenu(this);
     auto viewTypeGroup = new QActionGroup(titleContextMenu);