diff --git a/applets/digital-clock/plugin/timezonemodel.h b/applets/digital-clock/plugin/timezonemodel.h
index c002017f7..9c31f21b1 100644
--- a/applets/digital-clock/plugin/timezonemodel.h
+++ b/applets/digital-clock/plugin/timezonemodel.h
@@ -47,7 +47,7 @@ Q_SIGNALS:
 
 private:
     QString m_filterString;
-    bool m_onlyShowChecked;
+    bool m_onlyShowChecked = false;
     QStringMatcher m_stringMatcher;
 };