diff --git a/include/itkGaussianRadialBasisFunction.h b/include/itkGaussianRadialBasisFunction.h
index b23ed4e..c95b848 100644
--- a/include/itkGaussianRadialBasisFunction.h
+++ b/include/itkGaussianRadialBasisFunction.h
@@ -52,7 +52,7 @@ class ITK_TEMPLATE_EXPORT GaussianRadialBasisFunction : public RadialBasisFuncti
   /** Evaluate at the specified input position */
   ScalarType Evaluate(const ScalarType& input) const override;
 
-  virtual ScalarType EvaluateDerivative(const ScalarType& dist,const ArrayType& input,
+  ScalarType EvaluateDerivative(const ScalarType& dist,const ArrayType& input,
                                       char mode,int element_id=0) const override;
 
 protected:
diff --git a/include/itkNeuralNetworkFileReader.h b/include/itkNeuralNetworkFileReader.h
index 912f5e6..7dc8b69 100644
--- a/include/itkNeuralNetworkFileReader.h
+++ b/include/itkNeuralNetworkFileReader.h
@@ -110,7 +110,7 @@ class ITK_TEMPLATE_EXPORT NeuralNetworkFileReader:public Object
 
 protected:
   NeuralNetworkFileReader();
-  ~NeuralNetworkFileReader();
+  ~NeuralNetworkFileReader() override;
   void PrintSelf(std::ostream & os, Indent indent) const override;
 
 private:
diff --git a/include/itkNeuralNetworkFileWriter.h b/include/itkNeuralNetworkFileWriter.h
index e4e5364..a1ee26a 100644
--- a/include/itkNeuralNetworkFileWriter.h
+++ b/include/itkNeuralNetworkFileWriter.h
@@ -119,7 +119,7 @@ class ITK_TEMPLATE_EXPORT NeuralNetworkFileWriter:public Object
 
 protected:
   NeuralNetworkFileWriter();
-  ~NeuralNetworkFileWriter();
+  ~NeuralNetworkFileWriter() override;
   void PrintSelf(std::ostream & os, Indent indent) const override;
 
 private: