diff --git a/Kernel_23/doc/Kernel_23/Concepts/FunctionObjectConcepts.h b/Kernel_23/doc/Kernel_23/Concepts/FunctionObjectConcepts.h
index 47716e5fc2a..eaa708fe097 100644
--- a/Kernel_23/doc/Kernel_23/Concepts/FunctionObjectConcepts.h
+++ b/Kernel_23/doc/Kernel_23/Concepts/FunctionObjectConcepts.h
@@ -9140,6 +9140,8 @@ public:
 */
 class NonZeroDimension_3
 {
+public:
+
   /// \name Operations
   /// A model of this concept must provide:
   /// @{