diff --git a/curriculum/challenges/english/blocks/lecture-user-centered-design/672bb015cfc889794359c4e0.md b/curriculum/challenges/english/blocks/lecture-user-centered-design/672bb015cfc889794359c4e0.md
index fad09d61f99..7877a463cc5 100644
--- a/curriculum/challenges/english/blocks/lecture-user-centered-design/672bb015cfc889794359c4e0.md
+++ b/curriculum/challenges/english/blocks/lecture-user-centered-design/672bb015cfc889794359c4e0.md
@@ -38,7 +38,7 @@ dialog {
   box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
 }
 
-body::backdrop {
+dialog::backdrop {
   background: rgba(0, 0, 0, 0.5);
 }
 ```