diff --git a/lib/Slic3r/Fill/Rectilinear.pm b/lib/Slic3r/Fill/Rectilinear.pm
index 5607f09d0..b15524454 100644
--- a/lib/Slic3r/Fill/Rectilinear.pm
+++ b/lib/Slic3r/Fill/Rectilinear.pm
@@ -45,7 +45,7 @@ sub fill_surface {
     }
     
     # connect lines
-    {
+    if ($params{density} < 1) {
         my $collection = Slic3r::ExtrusionPath::Collection->new(
             paths => [ map Slic3r::ExtrusionPath->cast([ @$_ ], role => 'bogus'), @paths ],
         );