--- a/common/mld.cpp	2018-05-22 18:18:21.000000000 +0200
+++ b/common/mld.cpp	2018-06-26 13:59:58.562569302 +0200
@@ -24,6 +24,14 @@
 #include <QHostAddress>
 #include <QStringList>
 
+template <> inline Q_DECL_CONSTEXPR unsigned long qbswap<unsigned long>(unsigned long source) {
+  if (sizeof(unsigned long) == 8) {
+    return qbswap<quint64>(quint64(source));
+  } else {
+    return qbswap<quint32>(quint32(source));
+  }
+}
+
 MldProtocol::MldProtocol(StreamBase *stream, AbstractProtocol *parent)
     : GmpProtocol(stream, parent)
 {