diff --git a/GraphicsView/include/CGAL/Qt/vec.h b/GraphicsView/include/CGAL/Qt/vec.h
index 903db34f0f9..9e29db285e5 100644
--- a/GraphicsView/include/CGAL/Qt/vec.h
+++ b/GraphicsView/include/CGAL/Qt/vec.h
@@ -13,6 +13,8 @@
 #ifndef QGLVIEWER_VEC_H
 #define QGLVIEWER_VEC_H
 
+#include <QtGlobal>
+
 #include <iostream>
 #include <math.h>
 
diff --git a/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_affine_hull_d.h b/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_affine_hull_d.h
index b8339c7df6a..187619df4ad 100644
--- a/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_affine_hull_d.h
+++ b/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_affine_hull_d.h
@@ -19,7 +19,7 @@ affine hull of the points in `A = tuple [first,last)`.
 
 \tparam ForwardIterator has `Kernel_d::Point_d` as value type.
 */
-template <class ForwardIterator> Bounded_side
+template <class ForwardIterator> bool
 operator()( ForwardIterator first, ForwardIterator last, const
 Kernel_d::Point_d& p);
 
diff --git a/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_linear_hull_d.h b/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_linear_hull_d.h
index 42d043b52c0..4f2ff72d7d0 100644
--- a/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_linear_hull_d.h
+++ b/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_linear_hull_d.h
@@ -18,7 +18,7 @@ linear hull of the vectors in `A = tuple [first,last)`.
 \pre The objects are of the same dimension.
 \tparam ForwardIterator has `Kernel_d::Vector_d` as value type.
 */
-template <class ForwardIterator> Bounded_side
+template <class ForwardIterator> bool
 operator()( ForwardIterator first, ForwardIterator last, const
 Kernel_d::Vector_d& v);
 
diff --git a/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_simplex_d.h b/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_simplex_d.h
index 41af6fd8d9e..b2cea6611a4 100644
--- a/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_simplex_d.h
+++ b/Kernel_d/doc/Kernel_d/Concepts/Kernel--Contained_in_simplex_d.h
@@ -19,7 +19,7 @@ simplex of the points in `A = tuple [first,last)`.
 \pre The objects in \f$ A\f$ are of the same dimension and affinely independent.
 \tparam ForwardIterator has `Kernel_d::Point_d` as value type.
 */
-template <class ForwardIterator> Bounded_side
+template <class ForwardIterator> bool
 operator()( ForwardIterator first, ForwardIterator last, const
 Kernel_d::Point_d& p);