diff --git a/lib/Slic3r/Config.pm b/lib/Slic3r/Config.pm
index 93f3d8152..82c54b584 100644
--- a/lib/Slic3r/Config.pm
+++ b/lib/Slic3r/Config.pm
@@ -325,7 +325,7 @@ sub validate {
         my $max_nozzle_diameter = max(@{ $self->nozzle_diameter });
         die "Invalid extrusion width (too large)\n"
             if defined first { $_ > 10 * $max_nozzle_diameter }
-                map $self->get_value("${_}_extrusion_width"),
+                map $self->get_abs_value_over("${_}_extrusion_width", $self->layer_height),
                 qw(perimeter infill solid_infill top_infill support_material first_layer);
     }
     
@@ -355,6 +355,8 @@ sub validate {
             }
         }
     }
+    
+    return 1;
 }
 
 sub replace_options {
diff --git a/t/config.t b/t/config.t
index c9af472c7..7950dbb18 100644
--- a/t/config.t
+++ b/t/config.t
@@ -1,4 +1,4 @@
-use Test::More tests => 1;
+use Test::More tests => 2;
 use strict;
 use warnings;
 
@@ -17,4 +17,10 @@ use Slic3r::Test;
     is $ENV{SLIC3R_LAYER_HEIGHT}, '0.123', 'setenv';
 }
 
+{
+    my $config = Slic3r::Config->new_from_defaults;
+    $config->set('perimeter_extrusion_width', '250%');
+    ok $config->validate, 'percent extrusion width is validated';
+}
+
 __END__