diff --git a/Documentation/docs/migration_guides/itk_6_migration_guide.md b/Documentation/docs/migration_guides/itk_6_migration_guide.md
index f488cb38704d..a358a4be6955 100644
--- a/Documentation/docs/migration_guides/itk_6_migration_guide.md
+++ b/Documentation/docs/migration_guides/itk_6_migration_guide.md
@@ -9,9 +9,12 @@ Require modern C++ language feature use
 ---------------------------------------
 Many backward compatible/ forward enabling compiler features are now required to be used.
 
+Replace `ITKv5_CONST` with `const`
+
 Remove support for ITKv4 interfaces
 -----------------------------------
 
 `ITKV4_COMPATIBILITY` is no longer a supported option.  Previously this option
 was off by default.  Previously when enabled, the ITK API was modified to
 provide support for ITKV4 functions.
+