diff --git a/src/__celerity_resource_map__.php b/src/__celerity_resource_map__.php
index 36d62aa8f1..45a04a4137 100644
--- a/src/__celerity_resource_map__.php
+++ b/src/__celerity_resource_map__.php
@@ -1891,7 +1891,7 @@ celerity_register_resource_map(array(
   ),
   'javelin-behavior-pholio-mock-view' =>
   array(
-    'uri' => '/res/a1c0c8ae/rsrc/js/application/pholio/behavior-pholio-mock-view.js',
+    'uri' => '/res/57c05b5f/rsrc/js/application/pholio/behavior-pholio-mock-view.js',
     'type' => 'js',
     'requires' =>
     array(
diff --git a/src/applications/pholio/view/PholioMockImagesView.php b/src/applications/pholio/view/PholioMockImagesView.php
index 74009c02cf..72116f14ea 100644
--- a/src/applications/pholio/view/PholioMockImagesView.php
+++ b/src/applications/pholio/view/PholioMockImagesView.php
@@ -68,10 +68,11 @@ final class PholioMockImagesView extends AphrontView {
 
     $mockview = '';
 
-    $mock_wrapper = phutil_tag(
+    $mock_wrapper = javelin_tag(
       'div',
       array(
         'id' => $viewport_id,
+        'sigil' => 'mock-viewport',
         'class' => 'pholio-mock-image-viewport'
       ),
       '');
diff --git a/webroot/rsrc/js/application/pholio/behavior-pholio-mock-view.js b/webroot/rsrc/js/application/pholio/behavior-pholio-mock-view.js
index d708c96fd7..0d918372aa 100644
--- a/webroot/rsrc/js/application/pholio/behavior-pholio-mock-view.js
+++ b/webroot/rsrc/js/application/pholio/behavior-pholio-mock-view.js
@@ -194,7 +194,7 @@ JX.behavior('pholio-mock-view', function(config) {
 
   select_image(config.selectedID);
 
-  JX.Stratcom.listen('mousedown', 'mock-panel', function(e) {
+  JX.Stratcom.listen('mousedown', 'mock-viewport', function(e) {
     if (!e.isNormalMouseEvent()) {
       return;
     }