diff --git a/src/Symfony/Component/Cache/Adapter/DoctrineDbalAdapter.php b/src/Symfony/Component/Cache/Adapter/DoctrineDbalAdapter.php
index 16a0691cb2b42..700ad95b94abc 100644
--- a/src/Symfony/Component/Cache/Adapter/DoctrineDbalAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/DoctrineDbalAdapter.php
@@ -339,7 +339,7 @@ protected function doSave(array $values, int $lifetime)
      */
     protected function getId($key)
     {
-        if ('pgsql' !== $this->platformName ??= $this->getPlatformName()) {
+        if ('pgsql' !== $this->getPlatformName()) {
             return parent::getId($key);
         }