diff --git a/Applications/DataExplorer/DataView/FemConditionModel.h b/Applications/DataExplorer/DataView/FemConditionModel.h
index 0a2be756498f2bf05e03d126e16fb65739a000b9..66b0dc24571a856ef40ddfcd12e011cd3af0ab8b 100644
--- a/Applications/DataExplorer/DataView/FemConditionModel.h
+++ b/Applications/DataExplorer/DataView/FemConditionModel.h
@@ -24,7 +24,7 @@ class FemConditionModel : public TreeModel
 public:
     FemConditionModel(QObject* parent = nullptr);
 
-    int columnCount() const { return 2; }
+    int columnCount(const QModelIndex& /*parent*/ = QModelIndex()) const { return 2; }
 
 public slots:
     /// Clears the tree.