diff --git a/src/applications/phame/site/PhameBlogSite.php b/src/applications/phame/site/PhameBlogSite.php
index 6a5eebaf31..20bdfd5230 100644
--- a/src/applications/phame/site/PhameBlogSite.php
+++ b/src/applications/phame/site/PhameBlogSite.php
@@ -1,72 +1,73 @@
 <?php
 
 final class PhameBlogSite extends PhameSite {
 
   private $blog;
 
   public function setBlog(PhameBlog $blog) {
     $this->blog = $blog;
     return $this;
   }
 
   public function getBlog() {
     return $this->blog;
   }
 
   public function getDescription() {
     return pht('Serves blogs with custom domains.');
   }
 
   public function shouldRequireHTTPS() {
-    // TODO: We should probably provide options here eventually, but for now
-    // just never require HTTPS for external-domain blogs.
-    return false;
+    $full_uri = $this->getBlog()->getDomainFullURI();
+    $full_uri = new PhutilURI($full_uri);
+
+    return ($full_uri->getProtocol() == 'https');
   }
 
   public function getPriority() {
     return 3000;
   }
 
   public function newSiteForRequest(AphrontRequest $request) {
     if (!$this->isPhameActive()) {
       return null;
     }
 
     $host = $request->getHost();
 
     try {
       $blog = id(new PhameBlogQuery())
         ->setViewer(new PhabricatorUser())
         ->withDomain($host)
         ->needProfileImage(true)
         ->needHeaderImage(true)
         ->withStatuses(
           array(
             PhameBlog::STATUS_ACTIVE,
           ))
         ->executeOne();
     } catch (PhabricatorPolicyException $ex) {
       throw new Exception(
         pht(
           'This blog is not visible to logged out users, so it can not be '.
           'visited from a custom domain.'));
     }
 
     if (!$blog) {
       return null;
     }
 
     return id(new PhameBlogSite())->setBlog($blog);
   }
 
   public function getRoutingMaps() {
     $app = PhabricatorApplication::getByClass('PhabricatorPhameApplication');
 
     $maps = array();
     $maps[] = $this->newRoutingMap()
       ->setApplication($app)
       ->setRoutes($app->getBlogRoutes());
     return $maps;
   }
 
 }