diff --git a/plugins/samplesource/sdrdaemon/sdrdaemongui.cpp b/plugins/samplesource/sdrdaemon/sdrdaemongui.cpp
index 7514836aa..28ef410d4 100644
--- a/plugins/samplesource/sdrdaemon/sdrdaemongui.cpp
+++ b/plugins/samplesource/sdrdaemon/sdrdaemongui.cpp
@@ -39,6 +39,7 @@ SDRdaemonGui::SDRdaemonGui(PluginAPI* pluginAPI, QWidget* parent) :
 	m_sampleRate(0),
 	m_sampleRateStream(0),
 	m_centerFrequency(0),
+	m_syncLocked(false),
 	m_samplesCount(0),
 	m_tickCount(0),
 	m_address("127.0.0.1"),
@@ -198,6 +199,7 @@ bool SDRdaemonGui::handleMessage(const Message& message)
 	{
 		m_startingTimeStamp.tv_sec = ((SDRdaemonInput::MsgReportSDRdaemonStreamTiming&)message).get_tv_sec();
 		m_startingTimeStamp.tv_usec = ((SDRdaemonInput::MsgReportSDRdaemonStreamTiming&)message).get_tv_usec();
+		m_syncLocked = ((SDRdaemonInput::MsgReportSDRdaemonStreamTiming&)message).getSyncLock();
 		updateWithStreamTime();
 		return true;
 	}
@@ -300,6 +302,12 @@ void SDRdaemonGui::updateWithStreamTime()
 	QDateTime dt = QDateTime::fromMSecsSinceEpoch(startingTimeStampMsec);
 	QString s_date = dt.toString("yyyy-MM-dd  hh:mm:ss.zzz");
 	ui->absTimeText->setText(s_date);
+
+	if (m_syncLocked) {
+		ui->streamLocked->setStyleSheet("QToolButton { background-color : green; }");
+	} else {
+		ui->streamLocked->setStyleSheet("QToolButton { background:rgb(79,79,79); }");
+	}
 }
 
 void SDRdaemonGui::tick()
diff --git a/plugins/samplesource/sdrdaemon/sdrdaemongui.h b/plugins/samplesource/sdrdaemon/sdrdaemongui.h
index 346e134c2..2f307b38e 100644
--- a/plugins/samplesource/sdrdaemon/sdrdaemongui.h
+++ b/plugins/samplesource/sdrdaemon/sdrdaemongui.h
@@ -54,10 +54,13 @@ private:
 	QTimer m_updateTimer;
 	SampleSource* m_sampleSource;
     bool m_acquisition;
+
 	int m_sampleRate;
 	int m_sampleRateStream;
 	quint64 m_centerFrequency;
 	struct timeval m_startingTimeStamp;
+	bool m_syncLocked;
+
 	int m_samplesCount;
 	std::size_t m_tickCount;
 
diff --git a/plugins/samplesource/sdrdaemon/sdrdaemoninput.h b/plugins/samplesource/sdrdaemon/sdrdaemoninput.h
index 0bad392ec..7f4451df8 100644
--- a/plugins/samplesource/sdrdaemon/sdrdaemoninput.h
+++ b/plugins/samplesource/sdrdaemon/sdrdaemoninput.h
@@ -168,20 +168,29 @@ public:
 	public:
 		uint32_t get_tv_sec() const { return m_tv_sec; }
 		uint32_t get_tv_usec() const { return m_tv_usec; }
+		bool getSyncLock() const { return m_syncLock; }
 
-		static MsgReportSDRdaemonStreamTiming* create(uint32_t tv_sec, uint32_t tv_usec)
+		static MsgReportSDRdaemonStreamTiming* create(uint32_t tv_sec,
+				uint32_t tv_usec,
+				bool syncLock)
 		{
-			return new MsgReportSDRdaemonStreamTiming(tv_sec, tv_usec);
+			return new MsgReportSDRdaemonStreamTiming(tv_sec,
+					tv_usec,
+					syncLock);
 		}
 
 	protected:
 		uint32_t m_tv_sec;
 		uint32_t m_tv_usec;
+		bool m_syncLock;
 
-		MsgReportSDRdaemonStreamTiming(uint32_t tv_sec, uint32_t tv_usec) :
+		MsgReportSDRdaemonStreamTiming(uint32_t tv_sec,
+				uint32_t tv_usec,
+				bool syncLock) :
 			Message(),
 			m_tv_sec(tv_sec),
-			m_tv_usec(tv_usec)
+			m_tv_usec(tv_usec),
+			m_syncLock(syncLock)
 		{ }
 	};
 
diff --git a/plugins/samplesource/sdrdaemon/sdrdaemonudphandler.cpp b/plugins/samplesource/sdrdaemon/sdrdaemonudphandler.cpp
index 3342882d4..d5c907fb2 100644
--- a/plugins/samplesource/sdrdaemon/sdrdaemonudphandler.cpp
+++ b/plugins/samplesource/sdrdaemon/sdrdaemonudphandler.cpp
@@ -208,7 +208,8 @@ void SDRdaemonUDPHandler::tick()
 		m_tickCount = 0;
 		SDRdaemonInput::MsgReportSDRdaemonStreamTiming *report = SDRdaemonInput::MsgReportSDRdaemonStreamTiming::create(
 			m_tv_sec,
-			m_tv_usec);
+			m_tv_usec,
+			m_sdrDaemonBuffer.isSyncLocked());
 		m_outputMessageQueueToGUI->push(report);
 	}
 }