diff --git a/Surface_mesh_segmentation/include/CGAL/internal/Surface_mesh_segmentation/Surface_mesh_segmentation.h b/Surface_mesh_segmentation/include/CGAL/internal/Surface_mesh_segmentation/Surface_mesh_segmentation.h
index 4faee3c8936..82f5394c6f1 100644
--- a/Surface_mesh_segmentation/include/CGAL/internal/Surface_mesh_segmentation/Surface_mesh_segmentation.h
+++ b/Surface_mesh_segmentation/include/CGAL/internal/Surface_mesh_segmentation/Surface_mesh_segmentation.h
@@ -21,6 +21,8 @@
 #include <CGAL/internal/Surface_mesh_segmentation/Alpha_expansion_graph_cut.h>
 #include <CGAL/internal/Surface_mesh_segmentation/SDF_calculation.h>
 
+#include <CGAL/Kernel/global_functions_3.h>
+
 #include <CGAL/property_map.h>
 
 #include <cmath>
diff --git a/Surface_mesh_segmentation/include/CGAL/mesh_segmentation.h b/Surface_mesh_segmentation/include/CGAL/mesh_segmentation.h
index 987bdcfa87c..6282704cf10 100644
--- a/Surface_mesh_segmentation/include/CGAL/mesh_segmentation.h
+++ b/Surface_mesh_segmentation/include/CGAL/mesh_segmentation.h
@@ -22,6 +22,7 @@
  */
 #include <CGAL/internal/Surface_mesh_segmentation/Surface_mesh_segmentation.h>
 #include <boost/config.hpp>
+#include <CGAL/Kernel/global_functions_3.h>
 
 namespace CGAL
 {