diff --git a/plugins/datetime/datetimewidget.cpp b/plugins/datetime/datetimewidget.cpp
index 64817bfa0..504fdfb60 100644
--- a/plugins/datetime/datetimewidget.cpp
+++ b/plugins/datetime/datetimewidget.cpp
@@ -12,7 +12,7 @@ DatetimeWidget::DatetimeWidget(QWidget *parent)
 
     m_settings("deepin", "dde-dock-datetime"),
 
-    m_24HourFormat(m_settings.value("24HourFormat").toBool())
+    m_24HourFormat(m_settings.value("24HourFormat", true).toBool())
 {
 
 }