diff --git a/Isosurfacing_3/doc/Isosurfacing_3/Concepts/IsosurfacingDomainWithGradient_3.h b/Isosurfacing_3/doc/Isosurfacing_3/Concepts/IsosurfacingDomainWithGradient_3.h
index b2362053a7b..8469f77d0aa 100644
--- a/Isosurfacing_3/doc/Isosurfacing_3/Concepts/IsosurfacingDomainWithGradient_3.h
+++ b/Isosurfacing_3/doc/Isosurfacing_3/Concepts/IsosurfacingDomainWithGradient_3.h
@@ -3,8 +3,6 @@
 
 \cgalConcept
 
-\cgalRefines `IsosurfacingDomain_3`
-
 \brief The concept `IsosurfacingDomainWithGradient_3` describes the set of requirements to be
 fulfilled by any class used as input data for some isosurfacing algorithms.
 
@@ -12,6 +10,8 @@ This concept refines `IsosurfacingDomain_3` to add a `gradient()` function which
 by isosurfacing domains to query the domain for the gradient of the implicit field
 at a 3D query point (not necessarily a vertex) in space.
 
+\cgalRefines `IsosurfacingDomain_3`
+
 \cgalHasModel `CGAL::Isosurfacing::Explicit_Cartesian_grid_domain_3`
 \cgalHasModel `CGAL::Isosurfacing::Implicit_Cartesian_grid_domain_3`
 */