diff --git a/templates/CRM/Contact/Page/Inline/Address.tpl b/templates/CRM/Contact/Page/Inline/Address.tpl
index 07f4bece0be5..cacfffcd71ea 100644
--- a/templates/CRM/Contact/Page/Inline/Address.tpl
+++ b/templates/CRM/Contact/Page/Inline/Address.tpl
@@ -47,7 +47,7 @@
     {foreach from=$add.custom item=customGroup key=cgId} {* start of outer foreach *}
       {assign var="isAddressCustomPresent" value=1}
       {foreach from=$customGroup item=customValue key=cvId}
-        <details id="address_custom_{$cgId}_{$locationIndex}" class="crm-address-custom-{$cgId}-{$locationIndex}-accordion" {if $customValue.collapse_display}{else}open{/if}>
+        <details id="address_custom_{$cgId}_{$locationIndex}" class="crm-address-custom-{$cgId}-{$locationIndex}-accordion crm-accordion-light" {if $customValue.collapse_display}{else}open{/if}>
           <summary class="collapsible-title">
             {$customValue.title}
           </summary>