diff --git a/model/tablemodel.cpp b/model/tablemodel.cpp
index 36c57b8..dc5fab7 100644
--- a/model/tablemodel.cpp
+++ b/model/tablemodel.cpp
@@ -30,9 +30,15 @@ Qt::ItemFlags TableModel::flags(const QModelIndex& index) const {
 
 QHash<int, QByteArray> TableModel::roleNames() const { return ROLE_NAMES; }
 
-int TableModel::rowCount(const QModelIndex& parent) const { return m_items.size(); }
+int TableModel::rowCount(const QModelIndex& parent) const {
+  Q_UNUSED(parent);
+  return m_items.size();
+}
 
-int TableModel::columnCount(const QModelIndex& parent) const { return ROLE_NAMES.size(); }
+int TableModel::columnCount(const QModelIndex& parent) const {
+  Q_UNUSED(parent);
+  return ROLE_NAMES.size();
+}
 
 QVariant TableModel::data(const QModelIndex& index, int role) const {
   const int row    = index.row();
diff --git a/model/tablemodel.h b/model/tablemodel.h
index c44b641..63ca073 100644
--- a/model/tablemodel.h
+++ b/model/tablemodel.h
@@ -21,7 +21,7 @@ class TableModel : public QAbstractTableModel {
   QHash<int, QByteArray> roleNames() const override;
 
   int rowCount(const QModelIndex& parent = QModelIndex()) const override;
-  int columnCount(const QModelIndex& parent) const override;
+  int columnCount(const QModelIndex& parent = QModelIndex()) const override;
   QVariant data(const QModelIndex& index, int role) const override;
   QVariant headerData(int section, Qt::Orientation orientation, int role) const override;