diff --git a/plugins/channelrx/demodatv/atvdemodsink.cpp b/plugins/channelrx/demodatv/atvdemodsink.cpp
index 8c8b85ba7..ef3346d94 100644
--- a/plugins/channelrx/demodatv/atvdemodsink.cpp
+++ b/plugins/channelrx/demodatv/atvdemodsink.cpp
@@ -38,6 +38,8 @@ ATVDemodSink::ATVDemodSink() :
     m_numberSamplesPerHTop(0),
     m_fieldIndex(0),
     m_synchroSamples(0),
+    m_fieldDetectSampleCount(0),
+    m_vSyncDetectSampleCount(0),
     m_effMin(20.0f),
     m_effMax(-20.0f),
     m_ampMin(-1.0f),
@@ -50,6 +52,7 @@ ATVDemodSink::ATVDemodSink() :
     m_lineIndex(0),
 	m_hSyncShift(0.0f),
     m_hSyncErrorCount(0),
+    prevSample(0.0f),
     m_ampAverage(4800),
     m_bfoPLL(200/1000000, 100/1000000, 0.01),
     m_bfoFilter(200.0, 1000000.0, 0.9),