diff --git a/lib/Slic3r/ExPolygon.pm b/lib/Slic3r/ExPolygon.pm
index 8aba26fcb..5a59828f6 100644
--- a/lib/Slic3r/ExPolygon.pm
+++ b/lib/Slic3r/ExPolygon.pm
@@ -7,7 +7,7 @@ use warnings;
 use Boost::Geometry::Utils;
 use List::Util qw(first);
 use Math::Geometry::Voronoi;
-use Slic3r::Geometry qw(X Y A B point_in_polygon same_line epsilon scaled_epsilon);
+use Slic3r::Geometry qw(X Y A B point_in_polygon epsilon scaled_epsilon);
 use Slic3r::Geometry::Clipper qw(union_ex);
 
 sub wkt {
@@ -60,9 +60,9 @@ sub encloses_line {
     my $clip = $self->clip_line($line);
     if (!defined $tolerance) {
         # optimization
-        return @$clip == 1 && same_line($clip->[0]->pp, $line->pp);
+        return @$clip == 1 && $clip->[0]->coincides_with($line);
     } else {
-        return @$clip == 1 && abs(Boost::Geometry::Utils::linestring_length($clip->[0]->pp) - $line->length) < $tolerance;
+        return @$clip == 1 && abs($clip->[0]->length - $line->length) < $tolerance;
     }
 }
 
diff --git a/lib/Slic3r/Geometry.pm b/lib/Slic3r/Geometry.pm
index 17383f18a..15ee3d26d 100644
--- a/lib/Slic3r/Geometry.pm
+++ b/lib/Slic3r/Geometry.pm
@@ -14,7 +14,7 @@ our @EXPORT_OK = qw(
     polygon_has_vertex polyline_length can_connect_points deg2rad rad2deg
     rotate_points move_points clip_segment_polygon
     sum_vectors multiply_vector subtract_vectors dot perp polygon_points_visibility
-    line_intersection bounding_box bounding_box_intersect same_point same_line
+    line_intersection bounding_box bounding_box_intersect same_point
     longest_segment angle3points three_points_aligned line_direction
     polyline_remove_parallel_continuous_edges polyline_remove_acute_vertices
     polygon_remove_acute_vertices polygon_remove_parallel_continuous_edges
@@ -112,11 +112,6 @@ sub same_point {
     return $p1->[X] == $p2->[X] && $p1->[Y] == $p2->[Y];
 }
 
-sub same_line {
-    my ($line1, $line2) = @_;
-    return same_point($line1->[A], $line2->[A]) && same_point($line1->[B], $line2->[B]);
-}
-
 sub distance_between_points {
     my ($p1, $p2) = @_;
     return sqrt((($p1->[X] - $p2->[X])**2) + ($p1->[Y] - $p2->[Y])**2);
diff --git a/xs/src/Line.cpp b/xs/src/Line.cpp
index 4f60a2304..612116091 100644
--- a/xs/src/Line.cpp
+++ b/xs/src/Line.cpp
@@ -54,6 +54,12 @@ Line::point_at(double distance) const
     return p;
 }
 
+bool
+Line::coincides_with(const Line* line) const
+{
+    return this->a.coincides_with(&line->a) && this->b.coincides_with(&line->b);
+}
+
 #ifdef SLIC3RXS
 void
 Line::from_SV(SV* line_sv)
diff --git a/xs/src/Line.hpp b/xs/src/Line.hpp
index 795590d5e..2545cc564 100644
--- a/xs/src/Line.hpp
+++ b/xs/src/Line.hpp
@@ -20,6 +20,7 @@ class Line
     double length() const;
     Point* midpoint() const;
     Point* point_at(double distance) const;
+    bool coincides_with(const Line* line) const;
     
     #ifdef SLIC3RXS
     void from_SV(SV* line_sv);
diff --git a/xs/xsp/Line.xsp b/xs/xsp/Line.xsp
index 39c54b48c..57ff19a39 100644
--- a/xs/xsp/Line.xsp
+++ b/xs/xsp/Line.xsp
@@ -46,5 +46,15 @@ Line::rotate(angle, center_sv)
         center.from_SV_check(center_sv);
         THIS->rotate(angle, &center);
 
+bool
+Line::coincides_with(line_sv)
+    SV*     line_sv;
+    CODE:
+        Line line;
+        line.from_SV_check(line_sv);
+        RETVAL = THIS->coincides_with(&line);
+    OUTPUT:
+        RETVAL
+
 %}
 };