diff --git a/scripts/generate_errors.pl b/scripts/generate_errors.pl
index 0c1f7e1..2fe202e 100755
--- a/scripts/generate_errors.pl
+++ b/scripts/generate_errors.pl
@@ -3,15 +3,17 @@
 # Generate error.c
 #
 # Usage: ./generate_errors.pl or scripts/generate_errors.pl without arguments,
-# or generate_errors.pl include_dir data_dir error_file
+# or generate_errors.pl include_dir data_dir error_file include_crypto
+# include_crypto can be either 0 (don't include) or 1 (include). On by default.
 
 use strict;
 
-my ($include_dir, $data_dir, $error_file);
+my ($include_dir, $data_dir, $error_file, $include_crypto);
+my $crypto_dir = "crypto";
 
 if( @ARGV ) {
-    die "Invalid number of arguments" if scalar @ARGV != 3;
-    ($include_dir, $data_dir, $error_file) = @ARGV;
+    die "Invalid number of arguments" if scalar @ARGV != 4;
+    ($include_dir, $data_dir, $error_file, $include_crypto) = @ARGV;
 
     -d $include_dir or die "No such directory: $include_dir\n";
     -d $data_dir or die "No such directory: $data_dir\n";
@@ -19,6 +21,7 @@
     $include_dir = 'include/mbedtls';
     $data_dir = 'scripts/data_files';
     $error_file = 'library/error.c';
+    $include_crypto = 1;
 
     unless( -d $include_dir && -d $data_dir ) {
         chdir '..' or die;
@@ -27,6 +30,10 @@
     }
 }
 
+if( $include_crypto ) {
+    -d $crypto_dir or die "Crypto submodule not present\n";
+}
+
 my $error_format_file = $data_dir.'/error.fmt';
 
 my @low_level_modules = qw( AES ARC4 ARIA ASN1 BASE64 BIGNUM BLOWFISH
@@ -47,9 +54,19 @@
 
 $/ = $line_separator;
 
-my @files = <$include_dir/*.h>;
+my @headers = ();
+if ($include_crypto) {
+    @headers = <$crypto_dir/$include_dir/*.h>;
+    foreach my $header (<$include_dir/*.h>) {
+        my $basename = $header; $basename =~ s!.*/!!;
+        push @headers, $header unless -e "$crypto_dir/$include_dir/$basename";
+    }
+} else {
+     @headers = <$include_dir/*.h>;
+}
+
 my @matches;
-foreach my $file (@files) {
+foreach my $file (@headers) {
     open(FILE, "$file");
     my @grep_res = grep(/^\s*#define\s+MBEDTLS_ERR_\w+\s+\-0x[0-9A-Fa-f]+/, <FILE>);
     push(@matches, @grep_res);
@@ -73,8 +90,9 @@
     my ($error_name, $error_code) = $line =~ /(MBEDTLS_ERR_\w+)\s+\-(0x\w+)/;
     my ($description) = $line =~ /\/\*\*< (.*?)\.? \*\//;
 
-    die "Duplicated error code: $error_code ($error_name)\n"
-        if( $error_codes_seen{$error_code}++ );
+    if( $error_codes_seen{$error_code}++ ) {
+        die "Duplicated error code: $error_code ($error_name)\n";
+    }
 
     $description =~ s/\\/\\\\/g;
     if ($description eq "") {
diff --git a/scripts/generate_visualc_files.pl b/scripts/generate_visualc_files.pl
index 9913976..e6545bc 100755
--- a/scripts/generate_visualc_files.pl
+++ b/scripts/generate_visualc_files.pl
@@ -4,7 +4,8 @@
 # 2010
 #
 # Must be run from mbedTLS root or scripts directory.
-# Takes no argument.
+# Takes "include_crypto" as an argument that can be either 0 (don't include) or
+# 1 (include). Off by default.
 
 use warnings;
 use strict;
@@ -18,9 +19,16 @@
 my $vsx_sln_tpl_file = "scripts/data_files/vs2010-sln-template.sln";
 my $vsx_sln_file = "$vsx_dir/mbedTLS.sln";
 
+my $include_crypto = 0;
+if( @ARGV ) {
+    die "Invalid number of arguments" if scalar @ARGV != 1;
+    ($include_crypto) = @ARGV;
+}
+
 my $programs_dir = 'programs';
 my $header_dir = 'include/mbedtls';
 my $source_dir = 'library';
+my $crypto_dir = 'crypto';
 
 # Need windows line endings!
 my $vsx_hdr_tpl = <<EOT;
@@ -194,7 +202,18 @@
 
     my @app_list = get_app_list();
     my @headers = <$header_dir/*.h>;
-    my @sources = <$source_dir/*.c>;
+
+    my @sources = ();
+    if ($include_crypto) {
+        @sources = <$crypto_dir/$source_dir/*.c>;
+        foreach my $file (<$source_dir/*.c>) {
+            my $basename = $file; $basename =~ s!.*/!!;
+            push @sources, $file unless -e "$crypto_dir/$source_dir/$basename";
+        }
+    } else {
+         @sources = <$source_dir/*.c>;
+    }
+
     map { s!/!\\!g } @headers;
     map { s!/!\\!g } @sources;