diff --git a/plugins/channelrx/udpsrc/udpsrcgui.ui b/plugins/channelrx/udpsrc/udpsrcgui.ui
index dc678e3cc..fe1e46618 100644
--- a/plugins/channelrx/udpsrc/udpsrcgui.ui
+++ b/plugins/channelrx/udpsrc/udpsrcgui.ui
@@ -6,13 +6,13 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>351</width>
+    <width>342</width>
     <height>355</height>
    </rect>
   </property>
   <property name="minimumSize">
    <size>
-    <width>316</width>
+    <width>342</width>
     <height>0</height>
    </size>
   </property>
diff --git a/plugins/channeltx/udpsink/udpsink.cpp b/plugins/channeltx/udpsink/udpsink.cpp
index 0351869d8..c3072e5d1 100644
--- a/plugins/channeltx/udpsink/udpsink.cpp
+++ b/plugins/channeltx/udpsink/udpsink.cpp
@@ -164,6 +164,7 @@ void UDPSink::modulateSample()
             m_modPhasor += (m_running.m_fmDeviation / m_running.m_inputSampleRate) * (t / 32768.0) * M_PI * 2.0f;
             m_modSample.real(cos(m_modPhasor) * 10362.2f * m_running.m_gain);
             m_modSample.imag(sin(m_modPhasor) * 10362.2f * m_running.m_gain);
+            calculateLevel(m_modSample);
         }
         else
         {
diff --git a/plugins/channeltx/udpsink/udpsinkgui.ui b/plugins/channeltx/udpsink/udpsinkgui.ui
index 1be8afcb9..abe417cf3 100644
--- a/plugins/channeltx/udpsink/udpsinkgui.ui
+++ b/plugins/channeltx/udpsink/udpsinkgui.ui
@@ -639,6 +639,9 @@
           <height>16777215</height>
          </size>
         </property>
+        <property name="toolTip">
+         <string>Reset UDP buffer index</string>
+        </property>
         <property name="text">
          <string>R</string>
         </property>