diff --git a/application/views/survey/questions/answer/equation/answer.twig b/application/views/survey/questions/answer/equation/answer.twig
index 3d830ca7b1b..3c985968b82 100644
--- a/application/views/survey/questions/answer/equation/answer.twig
+++ b/application/views/survey/questions/answer/equation/answer.twig
@@ -11,7 +11,7 @@
 
 <!-- answer -->
 <input type="hidden" name="{{ name }}" id="java{{ name }}" value="{{ sValue }}">
-<div class='{{ coreClass }} hidden'>
+<div class='{{ coreClass }} {{ insideClass }} hidden'>
     {{ sEquation }}
 </div>
 <!-- end of answer -->