diff --git a/CoursewareExcalidrawBlockPlugin.php b/CoursewareExcalidrawBlockPlugin.php
index 046e0a7265ed5b7bd833cfc5fef7c8387c86f2c8..f53d5f3cf85d02c030c8929b4e4c6005aa474cd0 100644
--- a/CoursewareExcalidrawBlockPlugin.php
+++ b/CoursewareExcalidrawBlockPlugin.php
@@ -22,7 +22,7 @@ class CoursewareExcalidrawBlockPlugin extends StudIPPlugin implements \SystemPlu
         // Add CSS to set the correct icon for the block in the block adder
         $icon = Icon::create('block-canvas');
         \PageLayout::addStyle(
-            '.cw-blockadder-item.cw-blockadder-item-excalidraw {
+            '.cw-blockadder-item-list .cw-blockadder-item.cw-blockadder-item-excalidraw {
             background-image:url(' . $icon->asImagePath() . ')
         }'
         );