diff --git a/qrtplib/rtprandom.cpp b/qrtplib/rtprandom.cpp
index e5764714c..9362649f5 100644
--- a/qrtplib/rtprandom.cpp
+++ b/qrtplib/rtprandom.cpp
@@ -60,7 +60,7 @@ uint32_t RTPRandom::PickSeed()
     x = (uint32_t) getpid();
 #endif
     QDateTime currentDateTime = QDateTime::currentDateTime();
-    x += currentDateTime.toTime_t();
+    x += currentDateTime.toSecsSinceEpoch();
 #if defined(WIN32)
     x += QDateTime::currentMSecsSinceEpoch() % 1000;
 #else
diff --git a/sdrbase/util/uid.cpp b/sdrbase/util/uid.cpp
index 2cfbdad0c..db1098640 100644
--- a/sdrbase/util/uid.cpp
+++ b/sdrbase/util/uid.cpp
@@ -35,7 +35,7 @@
 uint64_t UidCalculator::getNewObjectId()
 {
     QDateTime currentDateTime = QDateTime::currentDateTime();
-    uint64_t uid = currentDateTime.toTime_t();
+    uint64_t uid = currentDateTime.toSecsSinceEpoch();
     uid *= 1000000UL; // make room for microseconds
 
 // Fallback to milliseconds:
diff --git a/swagger/sdrangel/code/qt5/client/SWGHttpRequest.cpp b/swagger/sdrangel/code/qt5/client/SWGHttpRequest.cpp
index 650af414b..e581396e6 100644
--- a/swagger/sdrangel/code/qt5/client/SWGHttpRequest.cpp
+++ b/swagger/sdrangel/code/qt5/client/SWGHttpRequest.cpp
@@ -54,7 +54,7 @@ void SWGHttpRequestInput::add_file(QString variable_name, QString local_filename
 SWGHttpRequestWorker::SWGHttpRequestWorker(QObject *parent)
     : QObject(parent), manager(nullptr)
 {
-    QRandomGenerator::global()->seed(QDateTime::currentDateTime().toTime_t());
+    QRandomGenerator::global()->seed(QDateTime::currentDateTime().toSecsSinceEpoch());
 
     manager = new QNetworkAccessManager(this);
     connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(on_manager_finished(QNetworkReply*)));
@@ -163,7 +163,7 @@ void SWGHttpRequestWorker::execute(SWGHttpRequestInput *input) {
         // variable layout is MULTIPART
 
         boundary = "__-----------------------"
-            + QString::number(QDateTime::currentDateTime().toTime_t())
+            + QString::number(QDateTime::currentDateTime().toSecsSinceEpoch())
             + QString::number(QRandomGenerator::global()->generate());
         QString boundary_delimiter = "--";
         QString new_line = "\r\n";