diff --git a/Intersections_2/include/CGAL/Intersections_2/Triangle_2_Triangle_2_intersection_impl.h b/Intersections_2/include/CGAL/Intersections_2/Triangle_2_Triangle_2_intersection_impl.h
index 89bcc1a8039..153389f81e6 100644
--- a/Intersections_2/include/CGAL/Intersections_2/Triangle_2_Triangle_2_intersection_impl.h
+++ b/Intersections_2/include/CGAL/Intersections_2/Triangle_2_Triangle_2_intersection_impl.h
@@ -120,8 +120,8 @@ void _cut_off(Pointlist_2_<K> &list,
             last->next = newrec;
             newrec->side = ON_ORIENTED_BOUNDARY;
             Line_2_Line_2_pair<K> linepair(&cutter,  &l);
-            typename Line_2_Line_2_pair<K>::Intersection_results isr;
-            isr = linepair.intersection_type();
+            CGAL_kernel_assertion_code(typename Line_2_Line_2_pair<K>::Intersection_results isr =)
+            linepair.intersection_type();
             CGAL_kernel_assertion(isr == Line_2_Line_2_pair<K>::POINT);
             newrec->point = linepair.intersection_point();
         }
diff --git a/Intersections_2/include/CGAL/Triangle_2_Triangle_2_do_intersect.h b/Intersections_2/include/CGAL/Triangle_2_Triangle_2_do_intersect.h
index 2ba8d047649..401593d71d4 100644
--- a/Intersections_2/include/CGAL/Triangle_2_Triangle_2_do_intersect.h
+++ b/Intersections_2/include/CGAL/Triangle_2_Triangle_2_do_intersect.h
@@ -76,7 +76,8 @@ bool intersection_test_edge(const typename K::Point_2 *  P1,
 			    const typename K::Point_2 *  Q1, 
 			    const typename K::Point_2 *  R1,
 			    const typename K::Point_2 *  P2, 
-			    const typename K::Point_2 *  Q2, 
+			    const typename K::Point_2 *
+                              CGAL_kernel_precondition_code(Q2),
 			    const typename K::Point_2 *  R2,
 			    const K & k ){