diff --git a/lib/cache/cache.class.php b/lib/cache/cache.class.php
index 135124d734..36e452d4bc 100644
--- a/lib/cache/cache.class.php
+++ b/lib/cache/cache.class.php
@@ -297,7 +297,7 @@ class cache
      * @access private
      * @return string
      */
-    private function getTableField(): string
+    public function getTableField(): string
     {
         return $this->config->cache->raw[$this->table];
     }