diff --git a/common/pdfjs/web/viewer.html b/common/pdfjs/web/viewer.html
index 86b7e88..59f154a 100644
--- a/common/pdfjs/web/viewer.html
+++ b/common/pdfjs/web/viewer.html
@@ -115,9 +115,9 @@ See https://github.com/adobe-type-tools/cmap-resources
               <span data-l10n-id="print_label">Print</span>
             </button>
 
-<!--            <button id="secondaryDownload" class="secondaryToolbarButton download visibleMediumView" title="Download" tabindex="54" data-l10n-id="download">-->
-<!--              <span data-l10n-id="download_label">Download</span>-->
-<!--            </button>-->
+            <button style="display:none;" id="secondaryDownload" class="secondaryToolbarButton download visibleMediumView" title="Download" tabindex="54" data-l10n-id="download">
+              <span data-l10n-id="download_label">Download</span>
+            </button>
 
             <a href="#" id="secondaryViewBookmark" class="secondaryToolbarButton bookmark visibleSmallView" title="Current view (copy or open in new window)" tabindex="55" data-l10n-id="bookmark">
               <span data-l10n-id="bookmark_label">Current View</span>
@@ -218,9 +218,9 @@ See https://github.com/adobe-type-tools/cmap-resources
                   <span data-l10n-id="print_label">Print</span>
                 </button>
 
-<!--                <button id="download" class="toolbarButton download hiddenMediumView" title="Download" tabindex="34" data-l10n-id="download">-->
-<!--                  <span data-l10n-id="download_label">Download</span>-->
-<!--                </button>-->
+                <button style="display:none;" id="download" class="toolbarButton download hiddenMediumView" title="Download" tabindex="34" data-l10n-id="download">
+                  <span data-l10n-id="download_label">Download</span>
+                </button>
                 <a href="#" id="viewBookmark" class="toolbarButton bookmark hiddenSmallView" title="Current view (copy or open in new window)" tabindex="35" data-l10n-id="bookmark">
                   <span data-l10n-id="bookmark_label">Current View</span>
                 </a>