diff --git a/lib/Slic3r/Config.pm b/lib/Slic3r/Config.pm
index 45021d18..a1e862aa 100644
--- a/lib/Slic3r/Config.pm
+++ b/lib/Slic3r/Config.pm
@@ -594,6 +594,7 @@ sub save {
     
     open my $fh, '>', $file;
     binmode $fh, ':utf8';
+    printf $fh "# generated by Slic3r $Slic3r::VERSION\n";
     foreach my $opt (sort keys %$Options) {
         next if $Options->{$opt}{gui_only};
         my $value = get_raw($opt);