diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 833b1a2a72..a74141d8c7 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -443,7 +443,7 @@ sub new {
             $print_info_sizer->Add($grid_sizer, 0, wxEXPAND);
             my @info = (
                 fil_m   => "Used Filament (m)",
-                fil_mm3 => "Used Filament (mm\u00B3)",
+                fil_mm3 => "Used Filament (mm\x{00B3})",
                 fil_g   => "Used Filament (g)",
                 cost    => "Cost",
                 time    => "Estimated printing time",
diff --git a/utils/post-processing/flowrate.pl b/utils/post-processing/flowrate.pl
index 4d742631ed..f29d2312d4 100755
--- a/utils/post-processing/flowrate.pl
+++ b/utils/post-processing/flowrate.pl
@@ -25,7 +25,7 @@ while (<>) {
                 my $mm_per_mm   = $e_length / $dist;  # dE/dXY
                 my $mm3_per_mm  = ($filament_diameter[$T] ** 2) * PI/4 * $mm_per_mm;
                 my $vol_speed   = $F/60 * $mm3_per_mm;
-                my $comment = sprintf ' ; dXY = %.3fmm ; dE = %.5fmm ; dE/XY = %.5fmm/mm; volspeed = %.5fmm\u00B3/sec',
+                my $comment = sprintf ' ; dXY = %.3fmm ; dE = %.5fmm ; dE/XY = %.5fmm/mm; volspeed = %.5fmm\x{00B3}/sec',
                     $dist, $e_length, $mm_per_mm, $vol_speed;
                 s/(\R+)/$comment$1/;
             }