diff --git a/lib/Slic3r/GUI/SkeinPanel.pm b/lib/Slic3r/GUI/SkeinPanel.pm
index 3fd246de8..2ea3dd765 100644
--- a/lib/Slic3r/GUI/SkeinPanel.pm
+++ b/lib/Slic3r/GUI/SkeinPanel.pm
@@ -229,9 +229,9 @@ sub repair_stl {
     }
     
     my $tmesh = Slic3r::TriangleMesh->new;
-    $tmesh->ReadSTLFile($input_file);
+    $tmesh->ReadSTLFile(Slic3r::encode_path($input_file));
     $tmesh->repair;
-    $tmesh->WriteOBJFile($output_file);
+    $tmesh->WriteOBJFile(Slic3r::encode_path($output_file));
     Slic3r::GUI::show_info($self, "Your file was repaired.", "Repair");
 }