diff --git a/Optimal_bounding_box/doc/Optimal_bounding_box/Concepts/OrientedBoundingBoxTraits.h b/Optimal_bounding_box/doc/Optimal_bounding_box/Concepts/OrientedBoundingBoxTraits.h
index 9ab9366cc19..c68e63ffec8 100644
--- a/Optimal_bounding_box/doc/Optimal_bounding_box/Concepts/OrientedBoundingBoxTraits.h
+++ b/Optimal_bounding_box/doc/Optimal_bounding_box/Concepts/OrientedBoundingBoxTraits.h
@@ -1,5 +1,3 @@
-namespace CGAL {
-
 /*!
 \ingroup PkgOptimalBoundingBoxConcepts
 \cgalConcept
@@ -36,5 +34,3 @@ public:
   /// Returns the unitary matrix `Q` obtained in the QR-decomposition of the matrix `m`.
   Matrix get_Q(const Matrix& m) const;
 };
-
-} // namespace CGAL
diff --git a/Optimal_bounding_box/doc/Optimal_bounding_box/PackageDescription.txt b/Optimal_bounding_box/doc/Optimal_bounding_box/PackageDescription.txt
index 438f248e4c5..f75add083e8 100644
--- a/Optimal_bounding_box/doc/Optimal_bounding_box/PackageDescription.txt
+++ b/Optimal_bounding_box/doc/Optimal_bounding_box/PackageDescription.txt
@@ -40,7 +40,7 @@ that are used in this package.
 
 \cgalCRPSection{Concepts}
 
-- `CGAL::OrientedBoundingBoxTraits`
+- `OrientedBoundingBoxTraits`
 
 \cgalCRPSection{Classes}