diff --git a/lib/Slic3r/Config.pm b/lib/Slic3r/Config.pm
index 947a1ebaee..606b26a8c3 100644
--- a/lib/Slic3r/Config.pm
+++ b/lib/Slic3r/Config.pm
@@ -490,6 +490,14 @@ sub get {
     return $value;
 }
 
+sub get_raw {
+    my $class = @_ == 2 ? shift : undef;
+    my ($opt_key) = @_;
+    no strict 'refs';
+    my $value = ${"Slic3r::$opt_key"};
+    return $value;
+}
+
 sub set {
     my $class = @_ == 3 ? shift : undef;
     my ($opt_key, $value) = @_;
@@ -501,8 +509,8 @@ sub serialize {
     my $class = @_ == 2 ? shift : undef;
     my ($opt_key) = @_;
     return $Options->{$opt_key}{serialize}
-        ? $Options->{$opt_key}{serialize}->(get($opt_key))
-        : get($opt_key);
+        ? $Options->{$opt_key}{serialize}->(get_raw($opt_key))
+        : get_raw($opt_key);
 }
 
 sub deserialize {
@@ -521,7 +529,7 @@ sub save {
     binmode $fh, ':utf8';
     foreach my $opt (sort keys %$Options) {
         next if $Options->{$opt}{gui_only};
-        my $value = get($opt);
+        my $value = get_raw($opt);
         $value = $Options->{$opt}{serialize}->($value) if $Options->{$opt}{serialize};
         printf $fh "%s = %s\n", $opt, $value;
     }
diff --git a/lib/Slic3r/GUI/OptionsGroup.pm b/lib/Slic3r/GUI/OptionsGroup.pm
index 993117752f..e9855ed860 100644
--- a/lib/Slic3r/GUI/OptionsGroup.pm
+++ b/lib/Slic3r/GUI/OptionsGroup.pm
@@ -44,7 +44,7 @@ sub new {
                 $size = Wx::Size->new($opt->{width} || -1, $opt->{height} || -1);
             }
             
-            my ($get, $set) = $opt->{type} eq 's@' ? qw(serialize deserialize) : qw(get set);
+            my ($get, $set) = $opt->{type} eq 's@' ? qw(serialize deserialize) : qw(get_raw set);
             
             $field = Wx::TextCtrl->new($parent, -1, Slic3r::Config->$get($opt_key),
                 Wx::wxDefaultPosition, $size, $style);
@@ -52,13 +52,13 @@ sub new {
             push @reload_callbacks, sub { $field->SetValue(Slic3r::Config->$get($opt_key)) };
         } elsif ($opt->{type} eq 'bool') {
             $field = Wx::CheckBox->new($parent, -1, "");
-            $field->SetValue(Slic3r::Config->get($opt_key));
+            $field->SetValue(Slic3r::Config->get_raw($opt_key));
             EVT_CHECKBOX($parent, $field, sub { Slic3r::Config->set($opt_key, $field->GetValue) });
-            push @reload_callbacks, sub { $field->SetValue(Slic3r::Config->get($opt_key)) };
+            push @reload_callbacks, sub { $field->SetValue(Slic3r::Config->get_raw($opt_key)) };
         } elsif ($opt->{type} eq 'point') {
             $field = Wx::BoxSizer->new(wxHORIZONTAL);
             my $field_size = Wx::Size->new(40, -1);
-            my $value = Slic3r::Config->get($opt_key);
+            my $value = Slic3r::Config->get_raw($opt_key);
             $field->Add($_) for (
                 Wx::StaticText->new($parent, -1, "x:"),
                 my $x_field = Wx::TextCtrl->new($parent, -1, $value->[0], Wx::wxDefaultPosition, $field_size),
@@ -67,14 +67,14 @@ sub new {
             );
             my $set_value = sub {
                 my ($i, $value) = @_;
-                my $val = Slic3r::Config->get($opt_key);
+                my $val = Slic3r::Config->get_raw($opt_key);
                 $val->[$i] = $value;
                 Slic3r::Config->set($opt_key, $val);
             };
             EVT_TEXT($parent, $x_field, sub { $set_value->(0, $x_field->GetValue) });
             EVT_TEXT($parent, $y_field, sub { $set_value->(1, $y_field->GetValue) });
             push @reload_callbacks, sub {
-                my $value = Slic3r::Config->get($opt_key);
+                my $value = Slic3r::Config->get_raw($opt_key);
                 $x_field->SetValue($value->[0]);
                 $y_field->SetValue($value->[1]);
             };
@@ -85,7 +85,7 @@ sub new {
                 Slic3r::Config->set($opt_key, $opt->{values}[$field->GetSelection]);
             });
             push @reload_callbacks, sub {
-                my $value = Slic3r::Config->get($opt_key);
+                my $value = Slic3r::Config->get_raw($opt_key);
                 $field->SetSelection(grep $opt->{values}[$_] eq $value, 0..$#{$opt->{values}});
             };
             $reload_callbacks[-1]->();