diff --git a/scipost_django/scipost/static/scipost/assets/config/preconfig.scss b/scipost_django/scipost/static/scipost/assets/config/preconfig.scss
index b47abe90de8a04b4e4464510922d8bba421bae13..e024a3d28e821d71f10ab9d6b8653ef659d15a1c 100644
--- a/scipost_django/scipost/static/scipost/assets/config/preconfig.scss
+++ b/scipost_django/scipost/static/scipost/assets/config/preconfig.scss
@@ -251,7 +251,7 @@ summary {
 }
 
 // Rotate the equilateral triangle when summary is open
-details[open] summary.list-triangle::before {
+details[open] > summary.list-triangle::before {
   content: "â–¼";
 }