diff --git a/seahub/templates/base.html b/seahub/templates/base.html
index f0fbf1d852..71a94a0010 100644
--- a/seahub/templates/base.html
+++ b/seahub/templates/base.html
@@ -128,7 +128,7 @@
 
 </div><!-- wrapper -->
 
-<script type="text/javascript" src="{{ MEDIA_URL }}js/jquery-1.12.1.min.js"></script>
+<script type="text/javascript" src="{{ MEDIA_URL }}js/jquery-1.12.1.min.js" id="jquery"></script>{# 'id="jquery"' is for pdf file view with pdf2html #}
 <script type="text/javascript" src="{% static "scripts/lib/jquery.simplemodal.js" %}"></script>
 <script type="text/javascript" src="{% static "scripts/lib/jquery.ui.tabs.js" %}"></script>
 <script type="text/javascript" src="{{ MEDIA_URL }}js/jq.min.js"></script>