diff --git a/mod/assign/templates/popout_button.mustache b/mod/assign/templates/popout_button.mustache
index 08d1914b969..7304fa3e27a 100644
--- a/mod/assign/templates/popout_button.mustache
+++ b/mod/assign/templates/popout_button.mustache
@@ -1 +1,3 @@
-<a href="#" data-region="popout-button">{{#pix}}e/fullscreen,core,{{#str}}togglezoom, mod_assign{{/str}}{{/pix}}</a>
+<a href="#" data-region="popout-button" aria-label="{{#str}}togglezoom, mod_assign{{/str}}" title="{{#str}}togglezoom, mod_assign{{/str}}">
+    {{#pix}}e/fullscreen,core{{/pix}}
+</a>