diff --git a/CHANGES.md b/CHANGES.md
index 25c92dce96cf8c4d027542cc45fcc4a54f4d9b05..2dcacb8048a657d14f2c156a3abf83c9e933ebb9 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -6,6 +6,7 @@ Changes
 
 ### Unreleased
 
+* 2020-09-03 - Adjusted navbar.mustache template due to upstream changes in theme Boost.
 * 2020-09-03 - Fixed Behat issues after upgrading to 3.9.
 * 2020-09-02 - Deleted own additional edit button for courses because upstream Boost reimplemented it.
                Many thanks to @christianwolters for providing this fix.
diff --git a/templates/navbar.mustache b/templates/navbar.mustache
index a246ed3243f25f4b1dbd01ee5250da948ae66f70..5784171b885857f716945c98ce714cd86f90c815 100644
--- a/templates/navbar.mustache
+++ b/templates/navbar.mustache
@@ -30,7 +30,7 @@
             <button aria-expanded="{{#navdraweropen}}true{{/navdraweropen}}{{^navdraweropen}}false{{/navdraweropen}}" aria-controls="nav-drawer" type="button" class="btn nav-link float-sm-left mr-1 btn-light bg-gray" data-action="toggle-drawer" data-side="left" data-preference="drawer-open-nav">{{#pix}}i/menubars{{/pix}}<span class="sr-only">{{#str}}sidepanel, core{{/str}}</span></button>
         </div>
 
-        <a href="{{{ config.wwwroot }}}" class="navbar-brand {{# output.should_display_navbar_logo }}has-logo{{/ output.should_display_navbar_logo }}
+        <a href="{{{ config.wwwroot }}}" class="navbar-brand aabtn {{# output.should_display_navbar_logo }}has-logo{{/ output.should_display_navbar_logo }}
             {{^ output.should_display_navbar_logo }}
                 d-none d-sm-inline
             {{/ output.should_display_navbar_logo }}
diff --git a/templates/navbar.mustache.original b/templates/navbar.mustache.original
index e3067d9bc81d543aa9662acf4b0b671bae59e290..c93e68f0c0be5a961dc9784a99e1c582387a90d2 100644
--- a/templates/navbar.mustache.original
+++ b/templates/navbar.mustache.original
@@ -23,7 +23,7 @@
             <button aria-expanded="{{#navdraweropen}}true{{/navdraweropen}}{{^navdraweropen}}false{{/navdraweropen}}" aria-controls="nav-drawer" type="button" class="btn nav-link float-sm-left mr-1 btn-light bg-gray" data-action="toggle-drawer" data-side="left" data-preference="drawer-open-nav">{{#pix}}i/menubars{{/pix}}<span class="sr-only">{{#str}}sidepanel, core{{/str}}</span></button>
         </div>
 
-        <a href="{{{ config.wwwroot }}}" class="navbar-brand {{# output.should_display_navbar_logo }}has-logo{{/ output.should_display_navbar_logo }}
+        <a href="{{{ config.wwwroot }}}" class="navbar-brand aabtn {{# output.should_display_navbar_logo }}has-logo{{/ output.should_display_navbar_logo }}
             {{^ output.should_display_navbar_logo }}
                 d-none d-sm-inline
             {{/ output.should_display_navbar_logo }}