diff --git a/include/rtkDePierroRegularizationImageFilter.h b/include/rtkDePierroRegularizationImageFilter.h
index 15071df9e..3e738a139 100644
--- a/include/rtkDePierroRegularizationImageFilter.h
+++ b/include/rtkDePierroRegularizationImageFilter.h
@@ -126,10 +126,10 @@ class ITK_EXPORT DePierroRegularizationImageFilter : public itk::ImageToImageFil
   GenerateInputRequestedRegion() override;
 
   void
-  GenerateOutputInformation() ITK_OVERRIDE;
+  GenerateOutputInformation() override;
 
   void
-  GenerateData() ITK_OVERRIDE;
+  GenerateData() override;
 
   MultpiplyImageFilterPointerType m_MultiplyConstant1ImageFilter;
   MultpiplyImageFilterPointerType m_MultiplyConstant2ImageFilter;
diff --git a/include/rtkZengBackProjectionImageFilter.h b/include/rtkZengBackProjectionImageFilter.h
index 05960985e..6e71425f4 100644
--- a/include/rtkZengBackProjectionImageFilter.h
+++ b/include/rtkZengBackProjectionImageFilter.h
@@ -123,22 +123,22 @@ class ITK_EXPORT ZengBackProjectionImageFilter : public BackProjectionImageFilte
 
 protected:
   ZengBackProjectionImageFilter();
-  ~ZengBackProjectionImageFilter() ITK_OVERRIDE = default;
+  ~ZengBackProjectionImageFilter() override = default;
 
   /** Apply changes to the input image requested region. */
   void
   GenerateInputRequestedRegion() override;
 
   void
-  GenerateOutputInformation() ITK_OVERRIDE;
+  GenerateOutputInformation() override;
 
   void
-  GenerateData() ITK_OVERRIDE;
+  GenerateData() override;
 
   /** The two inputs should not be in the same space so there is nothing
    * to verify. */
   void
-  VerifyInputInformation() const ITK_OVERRIDE;
+  VerifyInputInformation() const override;
 
   AddImageFilterPointerType          m_AddImageFilter;
   PasteImageFilterPointerType        m_PasteImageFilter;
diff --git a/include/rtkZengForwardProjectionImageFilter.h b/include/rtkZengForwardProjectionImageFilter.h
index e97b039d5..a75496287 100644
--- a/include/rtkZengForwardProjectionImageFilter.h
+++ b/include/rtkZengForwardProjectionImageFilter.h
@@ -115,21 +115,21 @@ class ITK_EXPORT ZengForwardProjectionImageFilter : public ForwardProjectionImag
 
 protected:
   ZengForwardProjectionImageFilter();
-  ~ZengForwardProjectionImageFilter() ITK_OVERRIDE = default;
+  ~ZengForwardProjectionImageFilter() override = default;
 
   void
-  GenerateInputRequestedRegion() ITK_OVERRIDE;
+  GenerateInputRequestedRegion() override;
 
   void
-  GenerateOutputInformation() ITK_OVERRIDE;
+  GenerateOutputInformation() override;
 
   void
-  GenerateData() ITK_OVERRIDE;
+  GenerateData() override;
 
   /** The two inputs should not be in the same space so there is nothing
    * to verify. */
   void
-  VerifyInputInformation() const ITK_OVERRIDE;
+  VerifyInputInformation() const override;
 
   RegionOfInterestPointerType        m_RegionOfInterest;
   AddImageFilterPointerType          m_AddImageFilter;