diff --git a/include/boost/geometry/strategies/cartesian/cart_intersect.hpp b/include/boost/geometry/strategies/cartesian/cart_intersect.hpp
index 302055bbd..ea690cb1a 100644
--- a/include/boost/geometry/strategies/cartesian/cart_intersect.hpp
+++ b/include/boost/geometry/strategies/cartesian/cart_intersect.hpp
@@ -121,7 +121,7 @@ struct relate_cartesian_segments
             coordinate_type const& dx_a, coordinate_type const& dy_a,
             coordinate_type const& dx_b, coordinate_type const& dy_b)
     {
-        // 1) Handle "disjoint", probably common case.
+        // 1) Handle "disjoint", common case.
         // per dimension, 2 cases: a_1----------a_2    b_1-------b_2 or B left of A
         coordinate_type ax_1, ax_2, bx_1, bx_2;
         bool ax_swapped = false, bx_swapped = false;
@@ -137,7 +137,7 @@ struct relate_cartesian_segments
         bool ay_swapped = false, by_swapped = false;
         detail::segment_arrange<segment_type1, 1>::apply(a, ay_1, ay_2, ay_swapped);
         detail::segment_arrange<segment_type2, 1>::apply(b, by_1, by_2, by_swapped);
-        if (ay_2 < ay_1 || ay_1 > by_2)
+        if (ay_2 < by_1 || ay_1 > by_2)
         {
             return Policy::disjoint();
         }