diff --git a/lib/activityutils.php b/lib/activityutils.php
index d4c01232ec..f3383efda5 100644
--- a/lib/activityutils.php
+++ b/lib/activityutils.php
@@ -281,19 +281,20 @@ class ActivityUtils
     static function validateUri($uri)
     {
         // Check mailto: URIs first
+        $validate = new Validate();
 
         if (preg_match('/^mailto:(.*)$/', $uri, $match)) {
-            return Validate::email($match[1], common_config('email', 'check_domain'));
+            return $validate->email($match[1], common_config('email', 'check_domain'));
         }
 
-        if (Validate::uri($uri)) {
+        if ($validate->uri($uri)) {
             return true;
         }
 
         // Possibly an upstream bug; tag: URIs aren't validated properly
         // unless you explicitly ask for them. All other schemes are accepted
         // for basic URI validation without asking.
-        if (Validate::uri($uri, array('allowed_scheme' => array('tag')))) {
+        if ($validate->uri($uri, array('allowed_scheme' => array('tag')))) {
             return true;
         }