diff --git a/lib/Slic3r/GCode/PlaceholderParser.pm b/lib/Slic3r/GCode/PlaceholderParser.pm
index e3dc30e8..f2a594bb 100644
--- a/lib/Slic3r/GCode/PlaceholderParser.pm
+++ b/lib/Slic3r/GCode/PlaceholderParser.pm
@@ -43,7 +43,7 @@ sub apply_config {
     foreach my $opt_key (@opt_keys) {
         my $value = $config->$opt_key;
         next unless ref($value) eq 'ARRAY';
-        $m->{"${opt_key}_" . ($_+1)} = $value->[$_] for 0..$#$value;
+        $m->{"${opt_key}_" . $_} = $value->[$_] for 0..$#$value;
         $m->{$opt_key} = $value->[0];
         if ($Slic3r::Config::Options->{$opt_key}{type} eq 'point') {
             $m->{"${opt_key}_X"} = $value->[0];
@@ -73,8 +73,8 @@ sub process {
         my $regex = join '|', keys %{$self->_multiple};
         $string =~ s/\[($regex)\]/$self->_multiple->{$1}/egx;
         
-        # unhandled indices are populated using the first value, except _0 which is ignored for safety
-        $string =~ s/\[($regex)_[1-9]\d*\]/$self->_multiple->{$1}/egx;
+        # unhandled indices are populated using the first value
+        $string =~ s/\[($regex)_\d+\]/$self->_multiple->{$1}/egx;
     }
     
     return $string;
diff --git a/t/custom_gcode.t b/t/custom_gcode.t
index e734886c..78610da1 100644
--- a/t/custom_gcode.t
+++ b/t/custom_gcode.t
@@ -1,4 +1,4 @@
-use Test::More tests => 14;
+use Test::More tests => 13;
 use strict;
 use warnings;
 
@@ -88,10 +88,9 @@ use Slic3r::Test;
     }
     
     $config->set('start_gcode', qq!
-;__temp0:[infill_extruder][first_layer_temperature_0]__
+;__temp0:[first_layer_temperature_0]__
 ;__temp1:[first_layer_temperature_1]__
 ;__temp2:[first_layer_temperature_2]__
-;__temp3:[first_layer_temperature_3]__
     !);
     {
         my $print = Slic3r::Test::init_print('20mm_cube', config => $config);
@@ -99,10 +98,9 @@ use Slic3r::Test;
         # we use the [infill_extruder] placeholder to make sure this test doesn't
         # catch a false positive caused by the unparsed start G-code option itself
         # being embedded in the G-code
-        ok $gcode =~ /temp0:1\[/, 'temperature placeholder for _0 ignored';
-        ok $gcode =~ /temp1:200/, 'temperature placeholder for first extruder correctly populated';
-        ok $gcode =~ /temp2:205/, 'temperature placeholder for second extruder correctly populated';
-        ok $gcode =~ /temp3:200/, 'tempearture placeholder for unused extruder populated with first value';
+        ok $gcode =~ /temp0:200/, 'temperature placeholder for first extruder correctly populated';
+        ok $gcode =~ /temp1:205/, 'temperature placeholder for second extruder correctly populated';
+        ok $gcode =~ /temp2:200/, 'tempearture placeholder for unused extruder populated with first value';
     }
 }