1 files changed, 1 insertions, 1 deletions
diff --git a/src/widgets/widgets/qdatetimeedit_p.h b/src/widgets/widgets/qdatetimeedit_p.h
index f7e6861677..73d8b9ebea 100644
--- a/src/widgets/widgets/qdatetimeedit_p.h
+++ b/src/widgets/widgets/qdatetimeedit_p.h
@@ -147,7 +147,7 @@ class QCalendarPopup : public QWidget
 {
     Q_OBJECT
 public:
-    QCalendarPopup(QWidget *parent = 0, QCalendarWidget *cw = 0);
+    explicit QCalendarPopup(QWidget *parent = 0, QCalendarWidget *cw = 0);
     QDate selectedDate() { return verifyCalendarInstance()->selectedDate(); }
     void setDate(const QDate &date);
     void setDateRange(const QDate &min, const QDate &max);