diff --git a/Point_set_processing_3/include/CGAL/OpenGR/compute_registration_transformation.h b/Point_set_processing_3/include/CGAL/OpenGR/compute_registration_transformation.h
index 8d3574c61ed..80294dab7e4 100644
--- a/Point_set_processing_3/include/CGAL/OpenGR/compute_registration_transformation.h
+++ b/Point_set_processing_3/include/CGAL/OpenGR/compute_registration_transformation.h
@@ -14,7 +14,7 @@
 
 #include <CGAL/license/Point_set_processing_3.h>
 
-#ifdef CGAL_LINKED_WITH_OPENGR
+#if defined(CGAL_LINKED_WITH_OPENGR) || defined(DOXYGEN_RUNNING)
 
 #include <CGAL/Aff_transformation_3.h>
 #include <CGAL/assertions.h>
diff --git a/Point_set_processing_3/include/CGAL/OpenGR/register_point_sets.h b/Point_set_processing_3/include/CGAL/OpenGR/register_point_sets.h
index d2e78139581..cfa8983296f 100644
--- a/Point_set_processing_3/include/CGAL/OpenGR/register_point_sets.h
+++ b/Point_set_processing_3/include/CGAL/OpenGR/register_point_sets.h
@@ -14,7 +14,7 @@
 
 #include <CGAL/license/Point_set_processing_3.h>
 
-#ifdef CGAL_LINKED_WITH_OPENGR
+#if defined(CGAL_LINKED_WITH_OPENGR) || defined(DOXYGEN_RUNNING)
 
 #include <CGAL/Aff_transformation_3.h>
 #include <CGAL/assertions.h>
diff --git a/Point_set_processing_3/include/CGAL/pointmatcher/compute_registration_transformation.h b/Point_set_processing_3/include/CGAL/pointmatcher/compute_registration_transformation.h
index 5c5347197e5..93f9aac39f6 100644
--- a/Point_set_processing_3/include/CGAL/pointmatcher/compute_registration_transformation.h
+++ b/Point_set_processing_3/include/CGAL/pointmatcher/compute_registration_transformation.h
@@ -14,7 +14,7 @@
 
 #include <CGAL/license/Point_set_processing_3.h>
 
-#ifdef CGAL_LINKED_WITH_POINTMATCHER
+#if defined(CGAL_LINKED_WITH_POINTMATCHER) || defined(DOXYGEN_RUNNING)
 
 #include <CGAL/Aff_transformation_3.h>
 #include <CGAL/assertions.h>
diff --git a/Point_set_processing_3/include/CGAL/pointmatcher/register_point_sets.h b/Point_set_processing_3/include/CGAL/pointmatcher/register_point_sets.h
index ddc9e55d9cf..0110b968b4a 100644
--- a/Point_set_processing_3/include/CGAL/pointmatcher/register_point_sets.h
+++ b/Point_set_processing_3/include/CGAL/pointmatcher/register_point_sets.h
@@ -14,7 +14,7 @@
 
 #include <CGAL/license/Point_set_processing_3.h>
 
-#ifdef CGAL_LINKED_WITH_POINTMATCHER
+#if defined(CGAL_LINKED_WITH_POINTMATCHER) || defined(DOXYGEN_RUNNING)
 
 #include <CGAL/Aff_transformation_3.h>
 #include <CGAL/assertions.h>