diff --git a/include/itkGridTransform.h b/include/itkGridTransform.h
index dbc3091..d8a5a86 100644
--- a/include/itkGridTransform.h
+++ b/include/itkGridTransform.h
@@ -90,7 +90,7 @@ class GridTransform : public Transform<double, 2, 2>
 
   // virtual:
   OutputPointType
-  TransformPoint(const InputPointType & x) const
+  TransformPoint(const InputPointType & x) const override
   {
     OutputPointType y;
     if (is_inverse())
@@ -175,14 +175,14 @@ class GridTransform : public Transform<double, 2, 2>
 
   // virtual:
   void
-  SetFixedParameters(const ParametersType & params)
+  SetFixedParameters(const ParametersType & params) override
   {
     this->m_FixedParameters = params;
   }
 
   // virtual:
   const ParametersType &
-  GetFixedParameters() const
+  GetFixedParameters() const override
   {
     ParametersType params = this->m_FixedParameters;
 
@@ -201,7 +201,7 @@ class GridTransform : public Transform<double, 2, 2>
 
   // virtual:
   void
-  SetParameters(const ParametersType & params)
+  SetParameters(const ParametersType & params) override
   {
     this->m_Parameters = params;
 
@@ -231,7 +231,7 @@ class GridTransform : public Transform<double, 2, 2>
 
   // virtual:
   const ParametersType &
-  GetParameters() const
+  GetParameters() const override
   {
     ParametersType params(GetNumberOfParameters());
     unsigned int   num_pts = params.size() / 2;
diff --git a/include/itkLegendrePolynomialTransform.h b/include/itkLegendrePolynomialTransform.h
index 6fa0745..2a1e642 100644
--- a/include/itkLegendrePolynomialTransform.h
+++ b/include/itkLegendrePolynomialTransform.h
@@ -115,7 +115,7 @@ class LegendrePolynomialTransform : public Transform<TScalar, 2, 2>
 
   // virtual:
   OutputPointType
-  TransformPoint(const InputPointType & x) const;
+  TransformPoint(const InputPointType & x) const override;
 
   // Inverse transformations:
   // If y = Transform(x), then x = BackTransform(y);
@@ -145,28 +145,28 @@ class LegendrePolynomialTransform : public Transform<TScalar, 2, 2>
 
   // virtual:
   void
-  SetFixedParameters(const ParametersType & params)
+  SetFixedParameters(const ParametersType & params) override
   {
     this->m_FixedParameters = params;
   }
 
   // virtual:
   const ParametersType &
-  GetFixedParameters() const
+  GetFixedParameters() const override
   {
     return this->m_FixedParameters;
   }
 
   // virtual:
   void
-  SetParameters(const ParametersType & params)
+  SetParameters(const ParametersType & params) override
   {
     this->m_Parameters = params;
   }
 
   // virtual:
   const ParametersType &
-  GetParameters() const
+  GetParameters() const override
   {
     return this->m_Parameters;
   }
@@ -355,7 +355,7 @@ class LegendrePolynomialTransform : public Transform<TScalar, 2, 2>
 
   // virtual: Generate a platform independent name:
   std::string
-  GetTransformTypeAsString() const
+  GetTransformTypeAsString() const override
   {
     std::string        base = Superclass::GetTransformTypeAsString();
     std::ostringstream name;
@@ -368,7 +368,7 @@ class LegendrePolynomialTransform : public Transform<TScalar, 2, 2>
 
   // virtual:
   void
-  PrintSelf(std::ostream & s, Indent indent) const;
+  PrintSelf(std::ostream & s, Indent indent) const override;
 
 private:
   // disable default copy constructor and assignment operator:
diff --git a/include/itkMeshTransform.h b/include/itkMeshTransform.h
index 2351df6..9012c53 100644
--- a/include/itkMeshTransform.h
+++ b/include/itkMeshTransform.h
@@ -90,7 +90,7 @@ class MeshTransform : public Transform<double, 2, 2>
 
   // virtual:
   OutputPointType
-  TransformPoint(const InputPointType & x) const
+  TransformPoint(const InputPointType & x) const override
   {
     OutputPointType y;
     if (transform_.grid_.cols_ == 0 || transform_.grid_.cols_ == 0)
@@ -180,14 +180,14 @@ class MeshTransform : public Transform<double, 2, 2>
 
   // virtual:
   void
-  SetFixedParameters(const ParametersType & params)
+  SetFixedParameters(const ParametersType & params) override
   {
     this->m_FixedParameters = params;
   }
 
   // virtual:
   const ParametersType &
-  GetFixedParameters() const
+  GetFixedParameters() const override
   {
     ParametersType params = this->m_FixedParameters;
 
@@ -212,7 +212,7 @@ class MeshTransform : public Transform<double, 2, 2>
 
   // virtual:
   void
-  SetParameters(const ParametersType & params)
+  SetParameters(const ParametersType & params) override
   {
     this->m_Parameters = params;
 
@@ -246,7 +246,7 @@ class MeshTransform : public Transform<double, 2, 2>
 
   // virtual:
   const ParametersType &
-  GetParameters() const
+  GetParameters() const override
   {
     ParametersType params(GetNumberOfParameters());
 
diff --git a/include/itkRBFTransform.h b/include/itkRBFTransform.h
index d1342b0..bca2f29 100644
--- a/include/itkRBFTransform.h
+++ b/include/itkRBFTransform.h
@@ -105,7 +105,7 @@ class RBFTransform : public Transform<double, 2, 2>
 
   // virtual:
   OutputPointType
-  TransformPoint(const InputPointType & uv) const;
+  TransformPoint(const InputPointType & uv) const override;
 
   // Inverse transformations:
   // If y = Transform(x), then x = BackTransform(y);
@@ -135,28 +135,28 @@ class RBFTransform : public Transform<double, 2, 2>
 
   // virtual:
   void
-  SetFixedParameters(const ParametersType & params)
+  SetFixedParameters(const ParametersType & params) override
   {
     this->m_FixedParameters = params;
   }
 
   // virtual:
   const ParametersType &
-  GetFixedParameters() const
+  GetFixedParameters() const override
   {
     return this->m_FixedParameters;
   }
 
   // virtual:
   void
-  SetParameters(const ParametersType & params)
+  SetParameters(const ParametersType & params) override
   {
     this->m_Parameters = params;
   }
 
   // virtual:
   const ParametersType &
-  GetParameters() const
+  GetParameters() const override
   {
     return this->m_Parameters;
   }
@@ -306,7 +306,7 @@ class RBFTransform : public Transform<double, 2, 2>
 
   // virtual:
   void
-  PrintSelf(std::ostream & s, Indent indent) const;
+  PrintSelf(std::ostream & s, Indent indent) const override;
 
 private:
   // disable default copy constructor and assignment operator:
diff --git a/include/itkRadialDistortionTransform.h b/include/itkRadialDistortionTransform.h
index 8206c9f..0851610 100644
--- a/include/itkRadialDistortionTransform.h
+++ b/include/itkRadialDistortionTransform.h
@@ -101,7 +101,7 @@ class RadialDistortionTransform : public Transform<TScalar, 2, 2>
 
   // virtual:
   OutputPointType
-  TransformPoint(const InputPointType & p) const;
+  TransformPoint(const InputPointType & p) const override;
 
   // virtual: Inverse transformations:
   // If y = Transform(x), then x = BackTransform(y);
@@ -131,28 +131,28 @@ class RadialDistortionTransform : public Transform<TScalar, 2, 2>
 
   // virtual:
   void
-  SetFixedParameters(const ParametersType & params)
+  SetFixedParameters(const ParametersType & params) override
   {
     this->m_FixedParameters = params;
   }
 
   // virtual:
   const ParametersType &
-  GetFixedParameters() const
+  GetFixedParameters() const override
   {
     return this->m_FixedParameters;
   }
 
   // virtual:
   void
-  SetParameters(const ParametersType & params)
+  SetParameters(const ParametersType & params) override
   {
     this->m_Parameters = params;
   }
 
   // virtual:
   const ParametersType &
-  GetParameters() const
+  GetParameters() const override
   {
     return this->m_Parameters;
   }
@@ -252,7 +252,7 @@ class RadialDistortionTransform : public Transform<TScalar, 2, 2>
 
   // virtual:
   void
-  PrintSelf(std::ostream & s, Indent indent) const;
+  PrintSelf(std::ostream & s, Indent indent) const override;
 
 private:
   // disable default copy constructor and assignment operator:
diff --git a/include/itkRegularStepGradientDescentOptimizer2.h b/include/itkRegularStepGradientDescentOptimizer2.h
index abcfcc5..6913210 100644
--- a/include/itkRegularStepGradientDescentOptimizer2.h
+++ b/include/itkRegularStepGradientDescentOptimizer2.h
@@ -91,7 +91,7 @@ class ITK_EXPORT RegularStepGradientDescentOptimizer2 :
   inline void MinimizeOff()		{ SetMaximize(true); }
   
   // virtual:
-  void StartOptimization();
+  void StartOptimization() override;
   
   // virtual:
   void ResumeOptimization();
@@ -145,7 +145,7 @@ class ITK_EXPORT RegularStepGradientDescentOptimizer2 :
 				 const DerivativeType & step_direction);
   
   // virtual:
-  void PrintSelf(std::ostream& os, Indent indent) const;
+  void PrintSelf(std::ostream& os, Indent indent) const override;
   
   // data members:
   DerivativeType	m_Gradient;