diff --git a/lib/Slic3r/GUI/SkeinPanel.pm b/lib/Slic3r/GUI/SkeinPanel.pm
index f4331240..ed1c67f2 100644
--- a/lib/Slic3r/GUI/SkeinPanel.pm
+++ b/lib/Slic3r/GUI/SkeinPanel.pm
@@ -69,7 +69,7 @@ sub new {
         },
         output => {
             title => 'Output',
-            options => [qw(output_filename_format)],
+            options => [qw(output_filename_format duplicate_distance)],
         },
         notes => {
             title => 'Notes',