diff --git a/notebook/templates/notebook.html b/notebook/templates/notebook.html
index 3d93ca15f..647b92850 100644
--- a/notebook/templates/notebook.html
+++ b/notebook/templates/notebook.html
@@ -46,7 +46,7 @@ data-notebook-path="{{notebook_path | urlencode}}"
 
 <span id="kernel_logo_widget">
   {% block kernel_logo_widget %}
-  <img class="current_kernel_logo" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"/>
+  <img class="current_kernel_logo" alt="Current Kernel Logo" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"/>
   {% endblock %}
 </span>