diff --git a/conf/default.conf.php b/conf/default.conf.php
index 0e3a281df5..aade9bf660 100644
--- a/conf/default.conf.php
+++ b/conf/default.conf.php
@@ -1370,14 +1370,6 @@ return array(
   // a large number (to sample only a few requests).
   'debug.profile-rate' => 0,
 
-
-// -- Previews  ------------------------------------------------------------- //
-
-  // Turn on to enable the "viewport" meta tag. This is a preview feature which
-  // will improve the usability of Phabricator on phones and tablets once it
-  // is ready.
-  'preview.viewport-meta-tag' => false,
-
 // -- Environment  ---------------------------------------------------------- //
 
   // Phabricator occasionally shells out to other binaries on the server.
diff --git a/src/view/page/PhabricatorBarePageView.php b/src/view/page/PhabricatorBarePageView.php
index 3a9c0ad4f4..9755ab4375 100644
--- a/src/view/page/PhabricatorBarePageView.php
+++ b/src/view/page/PhabricatorBarePageView.php
@@ -65,8 +65,7 @@ class PhabricatorBarePageView extends AphrontPageView {
     }
 
     $viewport_tag = null;
-    if (PhabricatorEnv::getEnvConfig('preview.viewport-meta-tag') ||
-        $this->getDeviceReady()) {
+    if ($this->getDeviceReady()) {
       $viewport_tag = phutil_render_tag(
         'meta',
         array(