diff --git a/sdrbase/settings/preferences.cpp b/sdrbase/settings/preferences.cpp
index 467444245..98b6ca284 100644
--- a/sdrbase/settings/preferences.cpp
+++ b/sdrbase/settings/preferences.cpp
@@ -8,7 +8,6 @@ Preferences::Preferences()
 
 void Preferences::resetToDefaults()
 {
-	m_sourceType.clear();
 	m_sourceDevice.clear();
 	m_audioType.clear();
 	m_audioDevice.clear();
@@ -24,7 +23,6 @@ void Preferences::resetToDefaults()
 QByteArray Preferences::serialize() const
 {
 	SimpleSerializer s(1);
-	s.writeString(1, m_sourceType);
 	s.writeString(2, m_sourceDevice);
 	s.writeString(3, m_audioType);
 	s.writeString(4, m_audioDevice);
@@ -51,7 +49,6 @@ bool Preferences::deserialize(const QByteArray& data)
 
 	if(d.getVersion() == 1)
 	{
-		d.readString(1, &m_sourceType);
 		d.readString(2, &m_sourceDevice);
 		d.readString(3, &m_audioType);
 		d.readString(4, &m_audioDevice);
diff --git a/sdrbase/settings/preferences.h b/sdrbase/settings/preferences.h
index 5fef43012..cf8d72b96 100644
--- a/sdrbase/settings/preferences.h
+++ b/sdrbase/settings/preferences.h
@@ -13,8 +13,6 @@ public:
 	QByteArray serialize() const;
 	bool deserialize(const QByteArray& data);
 
-	void setSourceType(const QString& value) { m_sourceType = value; }
-	const QString& getSourceType() const { return m_sourceType; }
 	void setSourceDevice(const QString& value) { m_sourceDevice= value; }
 	const QString& getSourceDevice() const { return m_sourceDevice; }
 	void setSourceIndex(const int value) { m_sourceIndex = value; }
@@ -40,9 +38,8 @@ public:
 	const QString& getLogFileName() const { return m_logFileName; }
 
 protected:
-	QString m_sourceType;
-	QString m_sourceDevice;
-	int m_sourceIndex;
+	QString m_sourceDevice; //!< Identification of the source used in R0 tab (GUI flavor) at startup
+	int m_sourceIndex;      //!< Index of the source used in R0 tab (GUI flavor) at startup
 
 	QString m_audioType;
 	QString m_audioDevice;
diff --git a/swagger/sdrangel/api/swagger/include/Preferences.yaml b/swagger/sdrangel/api/swagger/include/Preferences.yaml
index 96b1c9289..271ddd6f3 100644
--- a/swagger/sdrangel/api/swagger/include/Preferences.yaml
+++ b/swagger/sdrangel/api/swagger/include/Preferences.yaml
@@ -1,16 +1,16 @@
 Preferences:
   description: Repreents a Prefernce object
   properties:
-    sourceType:
-      type: string
     sourceDevice:
+      description: Identification of the source used in R0 tab (GUI flavor) at startup
       type: string
+    sourceIndex:
+      description: Index of the source used in R0 tab (GUI flavor) at startup
+      type: integer
     audioType:
       type: string
     audioDevice:
       type: string
-    sourceIndex:
-      type: integer
     latitude:
       type: number
       format: float