diff --git a/src/Markdown/FootnoteTrait.php b/src/Markdown/FootnoteTrait.php
index fe0886c..7c0843c 100644
--- a/src/Markdown/FootnoteTrait.php
+++ b/src/Markdown/FootnoteTrait.php
@@ -157,6 +157,7 @@ protected function renderFootnoteLink($block): string
      * @param string $line
      * @return false|int
      */
+    // phpcs:ignore SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint
     protected function identifyFootnoteList($line)
     {
         return preg_match('/^\[\^(.+?)]:/', $line);