diff --git a/Applications/Classification/otbImageSVMClassifier.cxx b/Applications/Classification/otbImageSVMClassifier.cxx
index 5ba1c6f4b4ca6b7066bf1436d766f1fa20c4cc44..d464f22f91457ef9c2cd5285f01e2fd162ba5300 100644
--- a/Applications/Classification/otbImageSVMClassifier.cxx
+++ b/Applications/Classification/otbImageSVMClassifier.cxx
@@ -156,7 +156,7 @@ private:
       FloatVectorImageType::Pointer inMask = GetParameterImage("mask");
       m_Extract = ExtractImageFilterType::New();
       m_Extract->SetInput( inMask );
-      m_Extract->SetChannel(0);
+      m_Extract->SetChannel(1);
       m_Extract->UpdateOutputInformation();
       
       m_ClassificationFilter->SetInputMask(m_Extract->GetOutput());