diff --git a/lib/Slic3r/Layer/Region.pm b/lib/Slic3r/Layer/Region.pm
index 238a8e98e..37d9b7723 100644
--- a/lib/Slic3r/Layer/Region.pm
+++ b/lib/Slic3r/Layer/Region.pm
@@ -252,7 +252,7 @@ sub make_perimeters {
         }
         
         # fill gaps
-        if ($Slic3r::Config->gap_fill_speed > 0) {
+        if ($Slic3r::Config->gap_fill_speed > 0 && $Slic3r::Config->fill_density > 0) {
             my $filler = Slic3r::Fill::Rectilinear->new(layer_id => $self->layer->id);
             
             my $w = $self->perimeter_flow->width;