diff --git a/src/Symfony/Component/Cache/Adapter/AbstractTagAwareAdapter.php b/src/Symfony/Component/Cache/Adapter/AbstractTagAwareAdapter.php
index a384b16adf55f..bf514a9d0778b 100644
--- a/src/Symfony/Component/Cache/Adapter/AbstractTagAwareAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/AbstractTagAwareAdapter.php
@@ -35,7 +35,7 @@ abstract class AbstractTagAwareAdapter implements TagAwareAdapterInterface, TagA
     use AbstractAdapterTrait;
     use ContractsTrait;
 
-    private const TAGS_PREFIX = "\0tags\0";
+    private const TAGS_PREFIX = '0tags0';
 
     protected function __construct(string $namespace = '', int $defaultLifetime = 0)
     {
diff --git a/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php b/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
index ff22e5a8ac56e..f355685ede390 100644
--- a/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
@@ -31,7 +31,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
     use LoggerAwareTrait;
     use ProxyTrait;
 
-    public const TAGS_PREFIX = "\0tags\0";
+    public const TAGS_PREFIX = '0tags0';
 
     private $deferred = [];
     private $tags;