diff --git a/src/Composer/Repository/CompositeRepository.php b/src/Composer/Repository/CompositeRepository.php
index 53d1fa9d9..ac1f2e149 100644
--- a/src/Composer/Repository/CompositeRepository.php
+++ b/src/Composer/Repository/CompositeRepository.php
@@ -177,6 +177,7 @@ class CompositeRepository implements RepositoryInterface
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         $total = 0;
diff --git a/src/Composer/Repository/FilterRepository.php b/src/Composer/Repository/FilterRepository.php
index 8778233fd..0582a0f54 100644
--- a/src/Composer/Repository/FilterRepository.php
+++ b/src/Composer/Repository/FilterRepository.php
@@ -185,6 +185,7 @@ class FilterRepository implements RepositoryInterface
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         if ($this->repo->count() > 0) {