diff --git a/packages/block-library/src/comments/index.php b/packages/block-library/src/comments/index.php
index bc44255fd3cf5..c2ca04e189d2d 100644
--- a/packages/block-library/src/comments/index.php
+++ b/packages/block-library/src/comments/index.php
@@ -102,7 +102,8 @@ function comments_query_loop_block_form_defaults( $fields ) {
 add_filter( 'comment_form_defaults', 'comments_query_loop_block_form_defaults' );
 
 /**
- * Enqueues styles for the legacy `core/post-comments` block.
+ * Enqueues styles from the legacy `core/post-comments` block. These styles are
+ * required by the block's fallback.
  *
  * @param string $block_name Name of the new block type.
  */