diff --git a/actions/userrss.php b/actions/userrss.php
index 1f103dc084..a30c7bc28f 100644
--- a/actions/userrss.php
+++ b/actions/userrss.php
@@ -79,4 +79,14 @@ class UserrssAction extends Rss10Action {
 		$avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
 		return ($avatar) ? $avatar->url : NULL;
 	}
+
+	# override parent to add X-SUP-ID URL
+	
+	function show_rss($limit=0) {
+		$url = common_local_url('sup', NULL, $this->user->id);
+		header('X-SUP-ID', $url);
+		parent::show_rss($limit);
+	}
+	
+	
 }
\ No newline at end of file
diff --git a/htaccess.sample b/htaccess.sample
index d05a746033..58b060b6c3 100644
--- a/htaccess.sample
+++ b/htaccess.sample
@@ -38,6 +38,8 @@ RewriteRule ^main/invite$ index.php?action=invite [L,QSA]
 RewriteRule ^main/favor$ index.php?action=favor [L,QSA]
 RewriteRule ^main/disfavor$ index.php?action=disfavor [L,QSA]
 
+RewriteRule ^main/sup$ index.php?action=sup [L,QSA]
+
 RewriteRule ^settings/profile$ index.php?action=profilesettings [L,QSA]
 RewriteRule ^settings/openid$ index.php?action=openidsettings [L,QSA]
 RewriteRule ^settings/im$ index.php?action=imsettings [L,QSA]
diff --git a/lib/util.php b/lib/util.php
index 924625e02d..1bc5b95b00 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -809,13 +809,17 @@ function common_default_avatar($size) {
 	return theme_path('default-avatar-'.$sizenames[$size].'.png');
 }
 
-function common_local_url($action, $args=NULL) {
-	global $config;
-	if ($config['site']['fancy']) {
-		return common_fancy_url($action, $args);
+function common_local_url($action, $args=NULL, $fragment=NULL) {
+	$url = NULL;
+	if (common_config('site','fancy')) {
+		$url = common_fancy_url($action, $args);
 	} else {
-		return common_simple_url($action, $args);
+		$url = common_simple_url($action, $args);
 	}
+	if (!is_null($fragment)) {
+		$url .= '#'.$fragment;
+	}
+	return $url;
 }
 
 function common_fancy_url($action, $args=NULL) {
@@ -971,6 +975,8 @@ function common_fancy_url($action, $args=NULL) {
 			}
 		 default: return common_simple_url($action, $args);
 		}
+	 case 'sup':
+		return common_path('main/sup');
 	 default:
 		return common_simple_url($action, $args);
 	}