diff --git a/notebook/lab/handlers.py b/notebook/lab/handlers.py
index 0b4153e81..21eca6810 100644
--- a/notebook/lab/handlers.py
+++ b/notebook/lab/handlers.py
@@ -17,7 +17,8 @@ class LabHandler(IPythonHandler):
         self.write(self.render_template('lab.html',
             page_title='Jupyter Lab',
             terminals_available=self.settings['terminals_available'],
-            mathjax_url=self.mathjax_url))
+            mathjax_url=self.mathjax_url,
+            mathjax_config=self.mathjax_config))
 
 #-----------------------------------------------------------------------------
 # URL to handler mappings
diff --git a/notebook/templates/lab.html b/notebook/templates/lab.html
index 6f99b9ed6..2f7175eaf 100644
--- a/notebook/templates/lab.html
+++ b/notebook/templates/lab.html
@@ -79,7 +79,7 @@
     {% endblock %}
 
     {% if mathjax_url %}
-    <script type="text/javascript" src="{{mathjax_url}}?config=TeX-AMS_HTML-full,Safe&amp;delayStartupUntil=configured" charset="utf-8"></script>
+    <script type="text/javascript" src="{{mathjax_url}}?config={{mathjax_config}}&amp;delayStartupUntil=configured" charset="utf-8"></script>
     {% endif %}
 
 </head>