diff --git a/Modules/Core/Common/include/otbMachineLearningModel.h b/Modules/Core/Common/include/otbMachineLearningModel.h
index c7ced39ba9ffc2e3dea393413785edee0a503653..a490f4b6408dd96157e53fd0ab8ec320fe7b85f7 100644
--- a/Modules/Core/Common/include/otbMachineLearningModel.h
+++ b/Modules/Core/Common/include/otbMachineLearningModel.h
@@ -166,7 +166,8 @@ protected:
   virtual TargetSampleType PredictRegression(const InputSampleType& input) const
   {
   itkGenericExceptionMacro(<< "Regression mode not implemented.");
-  }
+  (void)input;
+}
 
   virtual TargetSampleType PredictClassification(const InputSampleType& input) const = 0;