diff --git a/Modules/Applications/AppClassification/app/otbZonalStatistics.cxx b/Modules/Applications/AppClassification/app/otbZonalStatistics.cxx
index fde9f332d89f81566f3944f5f17969b3b9d7579c..97613526c4c569143ca46c6c5c64226dd1bbb522 100644
--- a/Modules/Applications/AppClassification/app/otbZonalStatistics.cxx
+++ b/Modules/Applications/AppClassification/app/otbZonalStatistics.cxx
@@ -381,7 +381,7 @@ public:
   ThresholdFilterType::Pointer m_ThresholdFilter;
   FloatVectorImageType::Pointer m_InputImage;
   LabelValueType m_IntNoData = itk::NumericTraits<LabelValueType>::max();
-  bool m_FromLabelImage;
+  bool m_FromLabelImage = false;
   StatsFilterType::LabelPopulationMapType m_CountMap;
   StatsFilterType::PixelValueMapType m_MeanMap;
   StatsFilterType::PixelValueMapType m_StdMap;