diff --git a/lib/Slic3r/Polyline.pm b/lib/Slic3r/Polyline.pm
index 786957dab..da9cc0479 100644
--- a/lib/Slic3r/Polyline.pm
+++ b/lib/Slic3r/Polyline.pm
@@ -144,6 +144,7 @@ sub rotate {
     my $self = shift;
     my ($angle, $center) = @_;
     @$self = Slic3r::Geometry::rotate_points($angle, $center, @$self);
+    bless $_, 'Slic3r::Point' for @$self;
     return $self;
 }
 
@@ -151,6 +152,7 @@ sub translate {
     my $self = shift;
     my ($x, $y) = @_;
     @$self = Slic3r::Geometry::move_points([$x, $y], @$self);
+    bless $_, 'Slic3r::Point' for @$self;
     return $self;
 }
 
diff --git a/t/fill.t b/t/fill.t
index f45aab2da..0e725698a 100644
--- a/t/fill.t
+++ b/t/fill.t
@@ -2,7 +2,7 @@ use Test::More;
 use strict;
 use warnings;
 
-plan tests => 2;
+plan tests => 4;
 
 BEGIN {
     use FindBin;
@@ -10,13 +10,16 @@ BEGIN {
 }
 
 use Slic3r;
+use Slic3r::Geometry qw(scale X Y);
+use Slic3r::Surface qw(:types);
 
-my $print = Slic3r::Print->new(
-    x_length => 50,
-    y_length => 50,
-);
+sub scale_points (@) { map [scale $_->[X], scale $_->[Y]], @_ }
 
 {
+    my $print = Slic3r::Print->new(
+        x_length => 50,
+        y_length => 50,
+    );
     my $filler = Slic3r::Fill::Rectilinear->new(print => $print);
     my $surface_width = 250;
     my $distance = $filler->adjust_solid_spacing(
@@ -27,4 +30,24 @@ my $print = Slic3r::Print->new(
     is $surface_width % $distance, 0, 'adjusted solid distance';
 }
 
+{
+    my $print = Slic3r::Print->new(
+        x_length => scale 100,
+        y_length => scale 100,
+    );
+    my $filler = Slic3r::Fill::Rectilinear->new(
+        print               => $print,
+        max_print_dimension => scale 100,
+    );
+    my $surface = Slic3r::Surface->new(
+        surface_type    => S_TYPE_TOP,
+        expolygon       => Slic3r::ExPolygon->new([ scale_points [0,0], [50,0], [50,50], [0,50] ]),
+    );
+    foreach my $angle (0, 45) {
+        $surface->expolygon->rotate($angle, [0,0]);
+        my ($params, @paths) = $filler->fill_surface($surface, flow_spacing => 0.69, density => 0.4);
+        is scalar @paths, 1, 'one continuous path';
+    }
+}
+
 __END__