lib/PublicInbox/Feed.pm | 4 ++--
 t/cgi.t                 | 2 +-

diff --git a/lib/PublicInbox/Feed.pm b/lib/PublicInbox/Feed.pm
index 2284f2399cdbafdffebf3a00691f91c0fcdbafeb..75fecf5b432cad06409b1a8efabfe9ece47db68f 100644
--- a/lib/PublicInbox/Feed.pm
+++ b/lib/PublicInbox/Feed.pm
@@ -60,7 +60,7 @@ }
 
 sub emit_atom {
 	my ($cb, $ctx) = @_;
-	my $fh = $cb->([ 200, ['Content-Type' => 'application/xml']]);
+	my $fh = $cb->([ 200, ['Content-Type' => 'application/atom+xml']]);
 	my $max = $ctx->{max} || MAX_PER_PAGE;
 	my $feed_opts = get_feedopts($ctx);
 	my $x = atom_header($feed_opts);
@@ -97,7 +97,7 @@ sub emit_atom_thread {
 	my ($cb, $ctx) = @_;
 	my $res = $ctx->{srch}->get_thread($ctx->{mid});
 	return _no_thread($cb) unless $res->{total};
-	my $fh = $cb->([200, ['Content-Type' => 'application/xml']]);
+	my $fh = $cb->([200, ['Content-Type' => 'application/atom+xml']]);
 	my $feed_opts = get_feedopts($ctx);
 
 	my $html_url = $feed_opts->{atomurl} = $ctx->{self_url};
diff --git a/t/cgi.t b/t/cgi.t
index b0af8ae179b2af2c8b9f6f5e00face8180ae6207..7f72eaa5df5e6842fa1f17ae453c68a2cf233bb3 100644
--- a/t/cgi.t
+++ b/t/cgi.t
@@ -206,7 +206,7 @@ 	if ($have_xml_feed) {
 		$path = "/test/blahblah%40example.com/t.atom";
 		$res = cgi_run($path);
 		like($res->{head}, qr/^Status: 200 /, "atom returned 200");
-		like($res->{head}, qr!^Content-Type: application/xml!m,
+		like($res->{head}, qr!^Content-Type: application/atom\+xml!m,
 			"search returned atom");
 		my $p = XML::Feed->parse(\($res->{body}));
 		is($p->format, "Atom", "parsed atom feed");