diff --git a/Point_set_processing_3/include/CGAL/jet_estimate_normals.h b/Point_set_processing_3/include/CGAL/jet_estimate_normals.h
index cbeaa348917..362bf0abf19 100644
--- a/Point_set_processing_3/include/CGAL/jet_estimate_normals.h
+++ b/Point_set_processing_3/include/CGAL/jet_estimate_normals.h
@@ -32,6 +32,7 @@
 #include <CGAL/property_map.h>
 #include <CGAL/point_set_processing_assertions.h>
 #include <CGAL/Memory_sizer.h>
+#include <CGAL/function.h>
 
 #include <CGAL/boost/graph/named_function_params.h>
 #include <CGAL/boost/graph/named_params_helper.h>
diff --git a/Point_set_processing_3/include/CGAL/jet_smooth_point_set.h b/Point_set_processing_3/include/CGAL/jet_smooth_point_set.h
index bb2135be03c..e9054ba2147 100644
--- a/Point_set_processing_3/include/CGAL/jet_smooth_point_set.h
+++ b/Point_set_processing_3/include/CGAL/jet_smooth_point_set.h
@@ -31,6 +31,7 @@
 #include <CGAL/Monge_via_jet_fitting.h>
 #include <CGAL/property_map.h>
 #include <CGAL/point_set_processing_assertions.h>
+#include <CGAL/function.h>
 
 #include <CGAL/boost/graph/named_function_params.h>
 #include <CGAL/boost/graph/named_params_helper.h>
diff --git a/Point_set_processing_3/include/CGAL/pca_estimate_normals.h b/Point_set_processing_3/include/CGAL/pca_estimate_normals.h
index 46b62a68758..68da25df8d8 100644
--- a/Point_set_processing_3/include/CGAL/pca_estimate_normals.h
+++ b/Point_set_processing_3/include/CGAL/pca_estimate_normals.h
@@ -33,6 +33,7 @@
 #include <CGAL/property_map.h>
 #include <CGAL/point_set_processing_assertions.h>
 #include <CGAL/Memory_sizer.h>
+#include <CGAL/function.h>
 
 #include <CGAL/boost/graph/named_function_params.h>
 #include <CGAL/boost/graph/named_params_helper.h>