diff --git a/lib/Slic3r/GUI/PresetEditor.pm b/lib/Slic3r/GUI/PresetEditor.pm
index 5a5f46dc2..09f619b28 100644
--- a/lib/Slic3r/GUI/PresetEditor.pm
+++ b/lib/Slic3r/GUI/PresetEditor.pm
@@ -803,7 +803,7 @@ sub _update {
     my $config = $self->{config};
 
     if (any { /$opt_key/ } qw(all_keys spiral_vase perimeters top_solid_layers fill_density support_material min_shell_thickness)) {
-        if ($config->spiral_vase && !($config->perimeters == 1 && $config->min_shell_thickness == 0 & $config->top_solid_layers == 0 && $config->fill_density == 0 && $config->support_material == 0)) {
+        if ($config->spiral_vase && !($config->perimeters == 1 && $config->min_shell_thickness == 0 && $config->top_solid_layers == 0 && $config->fill_density == 0 && $config->support_material == 0)) {
             my $dialog = Wx::MessageDialog->new($self,
                 "The Spiral Vase mode requires:\n"
                 . "- one perimeter\n"