diff --git a/classes/Profile.php b/classes/Profile.php
index bdac3ba453..fd41c6139a 100644
--- a/classes/Profile.php
+++ b/classes/Profile.php
@@ -752,6 +752,10 @@ class Profile extends Memcached_DataObject
                 throw new Exception("Can't save role '$name' for profile '{$this->id}'");
             }
 
+            if ($name == 'owner') {
+                User::blow('user:site_owner');
+            }
+
             Event::handle('EndGrantRole', array($this, $name));
         }
 
@@ -780,6 +784,10 @@ class Profile extends Memcached_DataObject
                 throw new Exception(sprintf(_('Cannot revoke role "%1$s" for user #%2$d; database error.'),$name, $this->id));
             }
 
+            if ($name == 'owner') {
+                User::blow('user:site_owner');
+            }
+
             Event::handle('EndRevokeRole', array($this, $name));
 
             return true;