diff --git a/Modules/Filtering/ImageManipulation/include/otbClampImageFilter.h b/Modules/Filtering/ImageManipulation/include/otbClampImageFilter.h
index a27574a9710a9bc972047904a5c53dcba6283e35..478eb952220a8cf08eed6b8550114d2053ba2ccd 100644
--- a/Modules/Filtering/ImageManipulation/include/otbClampImageFilter.h
+++ b/Modules/Filtering/ImageManipulation/include/otbClampImageFilter.h
@@ -105,13 +105,13 @@ protected:
   void PrintSelf(std::ostream& os, itk::Indent indent) const override;
 
   void GenerateOutputInformation(void) override
-  {
+    {
     Superclass::GenerateOutputInformation();
     unsigned int sizeIn = this->GetInput()->GetNumberOfComponentsPerPixel();
     this->GetFunctor().SetInputComponents( sizeIn );
     this->GetOutput()->SetNumberOfComponentsPerPixel( 
       this->GetFunctor().GetOutputSize () );
-  }
+    }
 
 private:
   ClampImageFilter(const Self&) = delete ;
diff --git a/Modules/Filtering/ImageManipulation/include/otbClampImageFilter.txx b/Modules/Filtering/ImageManipulation/include/otbClampImageFilter.txx
index d6f146436a981ee0b59e9bb4bf5d6e485824314f..b1ac37e2e3df315e4b2e402f9034a73ef25a4665 100644
--- a/Modules/Filtering/ImageManipulation/include/otbClampImageFilter.txx
+++ b/Modules/Filtering/ImageManipulation/include/otbClampImageFilter.txx
@@ -61,9 +61,12 @@ void
 ClampImageFilter<TInputImage, TOutputImage>
 ::SetUpper(OutputPixelValueType val)
 {
-  m_Upper = val;
-  this->GetFunctor().SetHighest( m_Upper );
-  this->Modified();
+  if ( m_Upper != val )
+    {
+    m_Upper = val;
+    this->GetFunctor().SetHighest( m_Upper );
+    this->Modified();
+    }
 }
 
 /**