diff --git a/css/backoffice/components/_compatibility.scss b/css/backoffice/components/_compatibility.scss
index 779ef3118..d14569a13 100644
--- a/css/backoffice/components/_compatibility.scss
+++ b/css/backoffice/components/_compatibility.scss
@@ -9,6 +9,7 @@
 
 fieldset {
   &:not(.ibo-fieldset) {
+    @extend %ibo-font-ral-nor-150;
     margin: 10px;
 
     & legend {