diff --git a/mainwindow.cpp b/mainwindow.cpp
index d9b9e9d04..bed4f8ad1 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -4787,7 +4787,9 @@ void MainWindow::on_genStdMsgsPushButton_clicked()         //genStdMsgs button
 
 void MainWindow::on_logQSOButton_clicked()                 //Log QSO button
 {
-  if (!m_hisCall.size ()) return;
+  if (!m_hisCall.size ()) {
+    MessageBox::warning_message (this, tr ("Warning:  DX Call field is empty."));
+  }
   // m_dateTimeQSOOn should really already be set but we'll ensure it gets set to something just in case
   if (!m_dateTimeQSOOn.isValid ()) {
     m_dateTimeQSOOn = QDateTime::currentDateTimeUtc();