diff --git a/dnsupdate_tlsa b/dnsupdate_tlsa
index 4daffbb..a96cfb9 100755
--- a/dnsupdate_tlsa
+++ b/dnsupdate_tlsa
@@ -32,6 +32,7 @@ use constant END_FOUND =>3;
 my $port = 53;
 my $ttl = 3600;
 my $help = 0;
+my $tsigalgo = 'hmac-md5';
 my ($oldcert, $cert, $tsigname, $tsigkey, $server, $verbose, $tsig);
 my ($old_rr, $new_rr, $update, $resolver, $reply);
 
@@ -43,7 +44,8 @@ GetOptions("help|?" => \$help,
 	   "cert=s" => \$cert,
 	   "ttl=i" => \$ttl,
 	   "tsigname=s" => \$tsigname,
-	   "tsigkey=s" => \$tsigkey)
+	   "tsigkey=s" => \$tsigkey,
+	   "tsigalgo=s" => \$tsigalgo)
     or die("Error in command line arguments\n");
 
 pod2usage(1) if ($help or scalar(@ARGV) != 2);
@@ -94,6 +96,7 @@ if (defined $old_rr && defined $new_rr) {
 
 if (defined $tsigname && defined $tsigkey) {
     $tsig =  Net::DNS::RR::TSIG->create($tsigname, $tsigkey);
+    $tsig->algorithm($tsigalgo);
     say $tsig->string if ($verbose);
     $update->push( additional => $tsig);
 }
@@ -166,6 +169,7 @@ dnsupdate_tlsa [options] zone dnsname
     -port	DNS port
     -tsigname	Name of tsig key
     -tsigkey	tsig key
+    -tsigalgo	tsig algorithm
     -oldcert	old certificate, to remote TLSA record
     -cert	current certificate, to add TLSA record