diff --git a/ground/openpilotgcs/src/plugins/config/configrevohwwidget.cpp b/ground/openpilotgcs/src/plugins/config/configrevohwwidget.cpp
index f04b3b493..73e18ba1c 100644
--- a/ground/openpilotgcs/src/plugins/config/configrevohwwidget.cpp
+++ b/ground/openpilotgcs/src/plugins/config/configrevohwwidget.cpp
@@ -32,6 +32,7 @@
 #include "hwsettings.h"
 #include <QDesktopServices>
 #include <QUrl>
+#include <QMessageBox>
 
 
 ConfigRevoHWWidget::ConfigRevoHWWidget(QWidget *parent) : ConfigTaskWidget(parent)
@@ -93,7 +94,7 @@ void ConfigRevoHWWidget::setupCustomCombos()
 
     connect(m_ui->cbFlexi, SIGNAL(currentIndexChanged(int)), this, SLOT(flexiPortChanged(int)));
     connect(m_ui->cbMain, SIGNAL(currentIndexChanged(int)), this, SLOT(mainPortChanged(int)));
-    connect(m_ui->cbModem, SIGNAL(currentIndexChanged(int)), this, SLOT(modemPortChanged(int)));
+    connect(m_ui->cbModem, SIGNAL(currentIndexChanged(int)), this, SLOT(modemPortChanged(int)));    
 }
 
 void ConfigRevoHWWidget::refreshWidgetsValues(UAVObject *obj)
@@ -291,6 +292,7 @@ void ConfigRevoHWWidget::modemPortChanged(int index)
         m_ui->cbTxPower->setVisible(true);
         m_ui->lblInitFreq->setVisible(true);
         m_ui->leInitFreq->setVisible(true);
+        QMessageBox::warning(this, tr("Warning"), tr("Activating the Radio requires an antenna be attached or modem damage will occur."));
     } else {
         m_ui->lblTxPower->setVisible(false);
         m_ui->cbTxPower->setVisible(false);