diff --git a/addons/web/static/src/scss/bootstrap_review_backend.scss b/addons/web/static/src/scss/bootstrap_review_backend.scss
index 704f3d605b1..f85d5773542 100644
--- a/addons/web/static/src/scss/bootstrap_review_backend.scss
+++ b/addons/web/static/src/scss/bootstrap_review_backend.scss
@@ -91,7 +91,7 @@
         }
 
         &:not(:first-child) {
-            margin-left: $btn-border-width;
+            margin-left: var(--btn-group-gap, $btn-border-width); 
         }
     }
 }