diff --git a/plugins/channeltx/modnfm/nfmmodgui.cpp b/plugins/channeltx/modnfm/nfmmodgui.cpp
index 967702890..57c1acee7 100644
--- a/plugins/channeltx/modnfm/nfmmodgui.cpp
+++ b/plugins/channeltx/modnfm/nfmmodgui.cpp
@@ -211,24 +211,9 @@ void NFMModGUI::handleSourceMessages()
     }
 }
 
-void NFMModGUI::on_deltaMinus_toggled(bool minus)
+void NFMModGUI::on_deltaFrequency_changed(qint64 value)
 {
-	int deltaFrequency = m_channelMarker.getCenterFrequency();
-	bool minusDelta = (deltaFrequency < 0);
-
-	if (minus ^ minusDelta) // sign change
-	{
-		m_channelMarker.setCenterFrequency(-deltaFrequency);
-	}
-}
-
-void NFMModGUI::on_deltaFrequency_changed(quint64 value)
-{
-	if (ui->deltaMinus->isChecked()) {
-		m_channelMarker.setCenterFrequency(-value);
-	} else {
-		m_channelMarker.setCenterFrequency(value);
-	}
+    m_channelMarker.setCenterFrequency(value);
 }
 
 void NFMModGUI::on_rfBW_currentIndexChanged(int index)
@@ -410,7 +395,9 @@ NFMModGUI::NFMModGUI(PluginAPI* pluginAPI, DeviceSinkAPI *deviceAPI, QWidget* pa
 
 	connect(&m_pluginAPI->getMainWindow()->getMasterTimer(), SIGNAL(timeout()), this, SLOT(tick()));
 
-	ui->deltaFrequency->setColorMapper(ColorMapper(ColorMapper::GrayGold));
+    ui->deltaFrequencyLabel->setText(QString("%1f").arg(QChar(0x94, 0x03)));
+    ui->deltaFrequency->setColorMapper(ColorMapper(ColorMapper::GrayGold));
+    ui->deltaFrequency->setValueRange(false, 7, -9999999, 9999999);
 
 	//m_channelMarker = new ChannelMarker(this);
 	m_channelMarker.setColor(Qt::red);
@@ -468,8 +455,7 @@ void NFMModGUI::applySettings()
 			48000,
 			m_channelMarker.getCenterFrequency());
 
-		ui->deltaFrequency->setValue(abs(m_channelMarker.getCenterFrequency()));
-		ui->deltaMinus->setChecked(m_channelMarker.getCenterFrequency() < 0);
+		ui->deltaFrequency->setValue(m_channelMarker.getCenterFrequency());
 
 		m_nfmMod->configure(m_nfmMod->getInputMessageQueue(),
 			m_rfBW[ui->rfBW->currentIndex()],
diff --git a/plugins/channeltx/modnfm/nfmmodgui.h b/plugins/channeltx/modnfm/nfmmodgui.h
index 4cbe059cc..7a638bb97 100644
--- a/plugins/channeltx/modnfm/nfmmodgui.h
+++ b/plugins/channeltx/modnfm/nfmmodgui.h
@@ -59,8 +59,7 @@ private slots:
     void viewChanged();
     void handleSourceMessages();
 
-    void on_deltaFrequency_changed(quint64 value);
-    void on_deltaMinus_toggled(bool minus);
+    void on_deltaFrequency_changed(qint64 value);
     void on_rfBW_currentIndexChanged(int index);
     void on_afBW_valueChanged(int value);
     void on_fmDev_valueChanged(int value);
diff --git a/plugins/channeltx/modnfm/nfmmodgui.ui b/plugins/channeltx/modnfm/nfmmodgui.ui
index 8a378b12a..72755746c 100644
--- a/plugins/channeltx/modnfm/nfmmodgui.ui
+++ b/plugins/channeltx/modnfm/nfmmodgui.ui
@@ -76,26 +76,20 @@
       <item>
        <layout class="QHBoxLayout" name="deltaFrequencyLayout">
         <item>
-         <widget class="QToolButton" name="deltaMinus">
-          <property name="toolTip">
-           <string>Frequency shift direction</string>
+         <widget class="QLabel" name="deltaFrequencyLabel">
+          <property name="minimumSize">
+           <size>
+            <width>16</width>
+            <height>0</height>
+           </size>
           </property>
           <property name="text">
-           <string>...</string>
-          </property>
-          <property name="icon">
-           <iconset>
-            <selectedoff>:/plus.png</selectedoff>
-            <selectedon>:/minus.png</selectedon>
-           </iconset>
-          </property>
-          <property name="checkable">
-           <bool>true</bool>
+           <string>Df</string>
           </property>
          </widget>
         </item>
         <item>
-         <widget class="ValueDial" name="deltaFrequency" native="true">
+         <widget class="ValueDialZ" name="deltaFrequency" native="true">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
             <horstretch>0</horstretch>
@@ -750,12 +744,6 @@
    <header>gui/rollupwidget.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>ValueDial</class>
-   <extends>QWidget</extends>
-   <header>gui/valuedial.h</header>
-   <container>1</container>
-  </customwidget>
   <customwidget>
    <class>LevelMeterVU</class>
    <extends>QWidget</extends>
@@ -773,6 +761,12 @@
    <header>gui/cwkeyergui.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ValueDialZ</class>
+   <extends>QWidget</extends>
+   <header>gui/valuedialz.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="../../../sdrbase/resources/res.qrc"/>