diff --git a/slic3r.pl b/slic3r.pl
index c2bee2219..a3cc3cfc2 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -71,10 +71,10 @@ my @external_configs = ();
 if ($opt{load}) {
     foreach my $configfile (@{$opt{load}}) {
         if (-e $configfile) {
-            push @external_configs, Slic3r::Config->load($configfile);
+            push @external_configs, Slic3r::Config::load($configfile);
         } elsif (-e "$FindBin::Bin/$configfile") {
             printf STDERR "Loading $FindBin::Bin/$configfile\n";
-            push @external_configs, Slic3r::Config->load("$FindBin::Bin/$configfile");
+            push @external_configs, Slic3r::Config::load("$FindBin::Bin/$configfile");
         } else {
             $opt{ignore_nonexistent_config} or die "Cannot find specified configuration file ($configfile).\n";
         }
diff --git a/utils/view-toolpaths.pl b/utils/view-toolpaths.pl
index 234a8123d..e064885ca 100755
--- a/utils/view-toolpaths.pl
+++ b/utils/view-toolpaths.pl
@@ -35,7 +35,7 @@ my %opt = ();
     # load config
     my $config = Slic3r::Config::new_from_defaults;
     if ($opt{load}) {
-        $config->apply(Slic3r::Config->load($opt{load}));
+        $config->apply(Slic3r::Config::load($opt{load}));
     }
     
     # init print