diff --git a/include-gpl/gui/glspectrum.h b/include-gpl/gui/glspectrum.h
index ce0c7f180..e83277bdf 100644
--- a/include-gpl/gui/glspectrum.h
+++ b/include-gpl/gui/glspectrum.h
@@ -56,6 +56,9 @@ public:
 	void newSpectrum(const std::vector<Real>& spectrum, int fftSize);
 	void clearSpectrumHistogram();
 
+	Real getWaterfallShare() const { return m_waterfallShare; }
+	void setWaterfallShare(Real waterfallShare);
+
 private:
 	struct ChannelMarkerState {
 		ChannelMarker* m_channelMarker;
diff --git a/sdrbase/gui/glspectrum.cpp b/sdrbase/gui/glspectrum.cpp
index b8ff4d34c..5c90cd96a 100644
--- a/sdrbase/gui/glspectrum.cpp
+++ b/sdrbase/gui/glspectrum.cpp
@@ -1530,3 +1530,16 @@ void GLSpectrum::channelMarkerDestroyed(QObject* object)
 {
 	removeChannelMarker((ChannelMarker*)object);
 }
+
+void GLSpectrum::setWaterfallShare(Real waterfallShare)
+{
+	if (waterfallShare < 0.1f) {
+		m_waterfallShare = 0.1f;
+	}
+	else if (waterfallShare > 0.8f) {
+		m_waterfallShare = 0.8f;
+	} else {
+		m_waterfallShare = waterfallShare;
+	}
+	m_changesPending = true;
+}
diff --git a/sdrbase/gui/glspectrumgui.cpp b/sdrbase/gui/glspectrumgui.cpp
index 7a07ad91f..8cc49c6e5 100644
--- a/sdrbase/gui/glspectrumgui.cpp
+++ b/sdrbase/gui/glspectrumgui.cpp
@@ -89,6 +89,7 @@ QByteArray GLSpectrumGUI::serialize() const
 	s.writeS32(15, m_histogramStroke);
 	s.writeBool(16, m_displayCurrent);
 	s.writeS32(17, m_displayTraceIntensity);
+	s.writeReal(18, m_glSpectrum->getWaterfallShare());
 	return s.final();
 }
 
@@ -119,6 +120,9 @@ bool GLSpectrumGUI::deserialize(const QByteArray& data)
 		d.readS32(15, &m_histogramStroke, 40);
 		d.readBool(16, &m_displayCurrent, false);
 		d.readS32(17, &m_displayTraceIntensity, 50);
+		Real waterfallShare;
+		d.readReal(18, &waterfallShare, 0.66);
+		m_glSpectrum->setWaterfallShare(waterfallShare);
 		applySettings();
 		return true;
 	} else {