diff --git a/src/Tokenizer/Tokens.php b/src/Tokenizer/Tokens.php
index a4f9b3a2288..7d9cd91ce99 100644
--- a/src/Tokenizer/Tokens.php
+++ b/src/Tokenizer/Tokens.php
@@ -287,6 +287,7 @@ public static function getBlockEdgeDefinitions(): array
      *
      * @param int $size
      */
+    #[\ReturnTypeWillChange]
     public function setSize($size): bool
     {
         if ($this->getSize() !== $size) {