diff --git a/Intersections_3/include/CGAL/Intersections_3/internal/Bbox_3_Triangle_3_do_intersect.h b/Intersections_3/include/CGAL/Intersections_3/internal/Bbox_3_Triangle_3_do_intersect.h
index 8eca9e6a517..0c88e508457 100644
--- a/Intersections_3/include/CGAL/Intersections_3/internal/Bbox_3_Triangle_3_do_intersect.h
+++ b/Intersections_3/include/CGAL/Intersections_3/internal/Bbox_3_Triangle_3_do_intersect.h
@@ -273,13 +273,13 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
   }};
 
   int forbidden_axis = -1;
-  int forbidden_size = -1;
+  int forbidden_side = -1;
   //determine whether one vector is collinear with an axis
   int tmp = collinear_axis<FT>(sides[0]);
   if(tmp != -1)
   {
     forbidden_axis = tmp;
-    forbidden_size = 0;
+    forbidden_side = 0;
   }
   else
   {
@@ -287,7 +287,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
     if(tmp != -1)
     {
       forbidden_axis = tmp;
-      forbidden_size = 1;
+      forbidden_side = 1;
     }
     else
     {
@@ -295,7 +295,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
       if(tmp != -1)
       {
         forbidden_axis = tmp;
-        forbidden_size = 2;
+        forbidden_side = 2;
       }
     }
   }
@@ -305,7 +305,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
 
   if(forbidden_axis != 0)
   {
-    if(forbidden_size != 0)
+    if(forbidden_side != 0)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,0,0>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))
@@ -314,7 +314,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
         return false;
     }
 
-    if(forbidden_size != 1)
+    if(forbidden_side != 1)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,0,1>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))
@@ -323,7 +323,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
         return false;
     }
 
-    if(forbidden_size != 2)
+    if(forbidden_side != 2)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,0,2>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))
@@ -335,7 +335,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
 
   if(forbidden_axis != 1)
   {
-    if(forbidden_size != 0)
+    if(forbidden_side != 0)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,1,0>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))
@@ -344,7 +344,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
         return false;
     }
 
-    if(forbidden_size != 1)
+    if(forbidden_side != 1)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,1,1>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))
@@ -353,7 +353,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
         return false;
     }
 
-    if(forbidden_size != 2)
+    if(forbidden_side != 2)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,1,2>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))
@@ -365,7 +365,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
 
   if(forbidden_axis != 2)
   {
-    if(forbidden_size != 0)
+    if(forbidden_side != 0)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,2,0>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))
@@ -374,7 +374,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
         return false;
     }
 
-    if(forbidden_size != 1)
+    if(forbidden_side != 1)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,2,1>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))
@@ -383,7 +383,7 @@ do_intersect_bbox_or_iso_cuboid_impl(const std::array< std::array<FT, 3>, 3>& tr
         return false;
     }
 
-    if(forbidden_size != 2)
+    if(forbidden_side != 2)
     {
       Uncertain<bool> b = do_axis_intersect<FT,Box3,2,2>(triangle, sides, bbox, do_axis_intersect_aux_impl);
       if(is_indeterminate(b))