diff --git a/Modulator.cpp b/Modulator.cpp
index 0b1b9a929..8811d16a3 100644
--- a/Modulator.cpp
+++ b/Modulator.cpp
@@ -302,7 +302,7 @@ qint64 Modulator::readData (char * data, qint64 maxSize)
           sample=qRound(m_amp*qSin(m_phi));
 
 //Here's where we transmit from a precomputed wave[] array:
-          if(m_toneSpacing < 0) sample=qRound(m_amp*foxcom_.wave[m_ic]);
+          if(!m_tuning and (m_toneSpacing < 0)) sample=qRound(m_amp*foxcom_.wave[m_ic]);
 //          if(m_ic < 10) qDebug() << "Mod Tx" << m_ic << m_amp
 //                                  << foxcom_.wave[m_ic] << sample
 //                                  << m_toneSpacing;