--- a/target/sdk/convert-config.pl
+++ b/target/sdk/convert-config.pl
@@ -1,13 +1,23 @@
 #!/usr/bin/env perl
 use strict;
 
+print <<EOF;
+config ALL
+	bool
+	default y
+
+EOF
+
 while (<>) {
 	chomp;
+	next if /^CONFIG_SIGNED_PACKAGES/;
 	next unless /^CONFIG_([^=]+)=(.*)$/;
 
 	my $var = $1;
 	my $val = $2;
 	my $type;
+
+	next if $var eq 'ALL';
 
 	if ($val eq 'y') {
 		$type = "bool";