1 files changed, 1 insertions, 1 deletions
diff --git a/src/widgets/kernel/qboxlayout.h b/src/widgets/kernel/qboxlayout.h
index 5ce9ca26f6..02c4b47343 100644
--- a/src/widgets/kernel/qboxlayout.h
+++ b/src/widgets/kernel/qboxlayout.h
@@ -54,7 +54,7 @@ public:
     enum Direction { LeftToRight, RightToLeft, TopToBottom, BottomToTop,
                      Down = TopToBottom, Up = BottomToTop };
 
-    explicit QBoxLayout(Direction, QWidget *parent = 0);
+    explicit QBoxLayout(Direction, QWidget *parent = Q_NULLPTR);
 
     ~QBoxLayout();