diff --git a/src/network/access/qhsts_p.h b/src/network/access/qhsts_p.h
index 0bc0a5d975..f3d5da9d23 100644
--- a/src/network/access/qhsts_p.h
+++ b/src/network/access/qhsts_p.h
@@ -85,8 +85,7 @@ private:
 
     struct DomainLabel
     {
-        DomainLabel() = default;
-        DomainLabel(const QString &name) : label(name) { }
+        DomainLabel(const QString &name = QString()) : label(name), domainIndex(0) {}
 
         bool operator < (const DomainLabel &rhs) const
         { return label < rhs.label; }