diff --git a/src/corelib/itemmodels/qabstractproxymodel.h b/src/corelib/itemmodels/qabstractproxymodel.h
index a11fb592abe..d32003c158c 100644
--- a/src/corelib/itemmodels/qabstractproxymodel.h
+++ b/src/corelib/itemmodels/qabstractproxymodel.h
@@ -66,7 +66,7 @@ public:
     void revert();
 
     QVariant data(const QModelIndex &proxyIndex, int role = Qt::DisplayRole) const;
-    QVariant headerData(int section, Qt::Orientation orientation, int role) const;
+    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
     QMap<int, QVariant> itemData(const QModelIndex &index) const;
     Qt::ItemFlags flags(const QModelIndex &index) const;