diff --git a/lib/Slic3r/Print.pm b/lib/Slic3r/Print.pm
index 23623e5e1..e3a2100cd 100644
--- a/lib/Slic3r/Print.pm
+++ b/lib/Slic3r/Print.pm
@@ -587,7 +587,8 @@ sub export_gcode {
     print  $fh "\n";
     
     # write start commands to file
-    printf $fh "M190 %s%d ; set bed temperature\n",
+    printf $fh "M%s %s%d ; set bed temperature\n",
+        ($Slic3r::gcode_flavor eq 'makerbot' ? '109' : '190'),
         ($Slic3r::gcode_flavor eq 'mach3' ? 'P' : 'S'), $Slic3r::first_layer_bed_temperature
             if $Slic3r::first_layer_bed_temperature && $Slic3r::start_gcode !~ /M190/i;
     printf $fh "M104 %s%d ; set temperature\n",