diff --git a/Shorewall/Perl/Shorewall/Config.pm b/Shorewall/Perl/Shorewall/Config.pm
index 62626bc..4552d80 100644
--- a/Shorewall/Perl/Shorewall/Config.pm
+++ b/Shorewall/Perl/Shorewall/Config.pm
@@ -813,6 +813,7 @@ sub numeric_value1 ( $ ) {
 
 sub hex_value( $ ) {
     my $val = lc $_[0];
+    $val =~ s/^0x//;
     return undef unless $val =~ /^[a-fA-F0-9]+$/;
     no warnings;
     oct '0x' . $val;
diff --git a/Shorewall/Perl/Shorewall/Tc.pm b/Shorewall/Perl/Shorewall/Tc.pm
index 8f53095..7699e4f 100644
--- a/Shorewall/Perl/Shorewall/Tc.pm
+++ b/Shorewall/Perl/Shorewall/Tc.pm
@@ -255,6 +255,7 @@ sub process_tc_rule( ) {
 	    fatal_error "Invalid MARK ($originalmark)"   unless $mark =~ /^([0-9]+|0x[0-9a-f]+)$/ and $designator =~ /^([0-9]+|0x[0-9a-f]+)$/;
 
 	    if ( $config{TC_ENABLED} eq 'Internal' || $config{TC_ENABLED} eq 'Shared' ) {
+		$originalmark =~ s/0x//g;
 		fatal_error "Unknown Class ($originalmark)}" unless ( $device = $classids{$originalmark} );
 	    }
 
@@ -762,7 +763,6 @@ sub validate_tc_class( ) {
 	fatal_error "Invalid INTERFACE:CLASS ($devclass)" if defined $rest;
 
 	if ( $device =~ /^(\d+|0x[\da-fA-F]+)$/ ) {
-	    $device =~ s/^0x//;
 	    ( $number , $classnumber ) = ( hex_value $device, hex_value $number );
 	    ( $device , $devref) = dev_by_number( $number );
 	} else {