diff --git a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Xy_coordinate_2.h b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Xy_coordinate_2.h
index 624702379e1..954a6c6dd43 100644
--- a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Xy_coordinate_2.h
+++ b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Xy_coordinate_2.h
@@ -219,9 +219,11 @@ public:
     /*!\brief
      * copy constructor
      */
+#ifdef DOXYGEN_RUNNING  
     Xy_coordinate_2(const Self& p) : 
         Base(static_cast<const Base&>(p)) {  
     }
+#endif  
 
     /*!\brief
      * Point at \c x, on \c curve with \c arcno. Finite points on vertical arcs