diff --git a/qmap/mainwindow.cpp b/qmap/mainwindow.cpp
index b64b35190..f126fa416 100644
--- a/qmap/mainwindow.cpp
+++ b/qmap/mainwindow.cpp
@@ -1114,3 +1114,13 @@ void MainWindow::on_actionAlso_Q65_30x_toggled(bool b)
   m_bAlso30=b;
 }
 
+
+void MainWindow::on_sbMaxDrift_valueChanged(int n)
+{
+  qDebug() << "aa";
+  if(n>0) {
+    ui->sbMaxDrift->setStyleSheet("QSpinBox { background-color: #ff6666; }");
+  } else {
+    ui->sbMaxDrift->setStyleSheet("");
+  }
+}
diff --git a/qmap/mainwindow.h b/qmap/mainwindow.h
index 9b6b57b00..715bd2bad 100644
--- a/qmap/mainwindow.h
+++ b/qmap/mainwindow.h
@@ -84,6 +84,8 @@ private slots:
   void on_actionQuick_Start_Guide_to_WSJT_X_2_7_and_QMAP_triggered();
   void on_actionAlso_Q65_30x_toggled(bool b);
 
+  void on_sbMaxDrift_valueChanged(int arg1);
+
 private:
   Ui::MainWindow *ui;
   QString m_appDir;