diff --git a/Intersections_2/include/CGAL/Triangle_2_Iso_rectangle_2_intersection.h b/Intersections_2/include/CGAL/Triangle_2_Iso_rectangle_2_intersection.h
index 2bd8191b5b4..439705a116f 100644
--- a/Intersections_2/include/CGAL/Triangle_2_Iso_rectangle_2_intersection.h
+++ b/Intersections_2/include/CGAL/Triangle_2_Iso_rectangle_2_intersection.h
@@ -271,7 +271,7 @@ namespace CGAL{ namespace internal {
       typename std::vector<Point>::iterator last = std::unique(result.begin(),result.end());
       result.erase(last,result.end());
 
-      while(result.back() == result.front() && result.size() > 1)
+      while(result.size() > 1 && result.back() == result.front())
         result.pop_back();
 
       switch(result.size()){