diff --git a/slic3r.pl b/slic3r.pl

index 11dc2fa..80e6dc7 100755

--- a/slic3r.pl

+++ b/slic3r.pl

@@ -13,6 +13,7 @@ use File::Basename qw(basename);

 use Getopt::Long qw(:config no_auto_abbrev);

 use List::Util qw(first);

 use POSIX qw(setlocale LC_NUMERIC ceil);

+$ENV{LC_NUMERIC} = 'en_US.UTF-8';

 use Slic3r;

 use Slic3r::Geometry qw(epsilon X Y Z deg2rad);

 use Time::HiRes qw(gettimeofday tv_interval);