1 files changed, 2 insertions, 2 deletions
diff --git a/src/corelib/statemachine/qhistorystate.h b/src/corelib/statemachine/qhistorystate.h
index 549be15ab0..97ac376688 100644
--- a/src/corelib/statemachine/qhistorystate.h
+++ b/src/corelib/statemachine/qhistorystate.h
@@ -54,8 +54,8 @@ public:
     };
     Q_ENUM(HistoryType)
 
-    QHistoryState(QState *parent = 0);
-    QHistoryState(HistoryType type, QState *parent = 0);
+    QHistoryState(QState *parent = Q_NULLPTR);
+    QHistoryState(HistoryType type, QState *parent = Q_NULLPTR);
     ~QHistoryState();
 
     QAbstractState *defaultState() const;