diff --git a/lib/Slic3r/GUI/Tab.pm b/lib/Slic3r/GUI/Tab.pm
index 259ec7752..ffef07066 100644
--- a/lib/Slic3r/GUI/Tab.pm
+++ b/lib/Slic3r/GUI/Tab.pm
@@ -806,7 +806,7 @@ sub _update {
         
         my $new_conf = Slic3r::Config->new;
         if ($dialog->ShowModal() == wxID_YES) {
-            $new_conf->set("fill_pattern", 1);
+            $new_conf->set("fill_pattern", 'rectilinear');
         } else {
             $new_conf->set("fill_density", 40);
         }