diff --git a/lib/Slic3r/Print.pm b/lib/Slic3r/Print.pm
index 2b413360a..a84ba70cf 100644
--- a/lib/Slic3r/Print.pm
+++ b/lib/Slic3r/Print.pm
@@ -228,7 +228,7 @@ sub init_extruders {
         (map $self->config->get("${_}_extruder")-1, qw(perimeter infill support_material support_material_interface)),
         (values %extruder_mapping),
     );
-    for my $extruder_id (keys %{{ map {$_ => 1} @used_extruders }}) {
+    for my $extruder_id (0 .. max(@used_extruders)) {
         $self->extruders->[$extruder_id] = Slic3r::Extruder->new(
             config => $self->config,
             id => $extruder_id,
diff --git a/t/multi.t b/t/multi.t
index c7214e8b9..1a46f353d 100644
--- a/t/multi.t
+++ b/t/multi.t
@@ -1,4 +1,4 @@
-use Test::More tests => 1;
+use Test::More tests => 2;
 use strict;
 use warnings;
 
@@ -59,4 +59,12 @@ use Slic3r::Test;
     ok !(first { $convex_hull->encloses_point($_) } @toolchange_points), 'all toolchanges happen outside skirt';
 }
 
+{
+    my $config = Slic3r::Config->new_from_defaults;
+    $config->set('support_material_extruder', 3);
+    
+    my $print = Slic3r::Test::init_print('20mm_cube', config => $config);
+    ok Slic3r::Test::gcode($print), 'no errors when using non-consecutive extruders';
+}
+
 __END__