diff --git a/Modules/Applications/AppClassification/app/otbTrainImagesRegression.cxx b/Modules/Applications/AppClassification/app/otbTrainImagesRegression.cxx
index 33ceaa5b5311c5110b44c46a6fbf8235651763c0..00d6465ccbbed506bacd3d940a75c33c0ac0f781 100644
--- a/Modules/Applications/AppClassification/app/otbTrainImagesRegression.cxx
+++ b/Modules/Applications/AppClassification/app/otbTrainImagesRegression.cxx
@@ -101,7 +101,6 @@ private:
     SetOfficialDocLink();
   }
 
-protected:
   /** Holds sampling parameters specific to training or validation */
   struct SamplingParameters
   {
@@ -379,7 +378,6 @@ protected:
     ExecuteInternal("training");
   }
 
-private:
   void DoUpdateParameters() override
   {
   }