diff --git a/plugins/samplesink/plutosdroutput/plutosdroutputgui.cpp b/plugins/samplesink/plutosdroutput/plutosdroutputgui.cpp
index cd81c7aa0..8d4a48521 100644
--- a/plugins/samplesink/plutosdroutput/plutosdroutputgui.cpp
+++ b/plugins/samplesink/plutosdroutput/plutosdroutputgui.cpp
@@ -182,7 +182,7 @@ void PlutoSDROutputGUI::on_loPPM_valueChanged(int value)
 
 void PlutoSDROutputGUI::on_swInterp_currentIndexChanged(int index)
 {
-    m_settings.m_log2Interp = index > 6 ? 6 : index;
+    m_settings.m_log2Interp = index > 5 ? 5 : index;
     sendSettings();
 }
 
diff --git a/plugins/samplesink/plutosdroutput/plutosdroutputgui.ui b/plugins/samplesink/plutosdroutput/plutosdroutputgui.ui
index 60a2fc7e1..a8c7e7183 100644
--- a/plugins/samplesink/plutosdroutput/plutosdroutputgui.ui
+++ b/plugins/samplesink/plutosdroutput/plutosdroutputgui.ui
@@ -308,11 +308,6 @@
          <string>32</string>
         </property>
        </item>
-       <item>
-        <property name="text">
-         <string>64</string>
-        </property>
-       </item>
       </widget>
      </item>
      <item>