diff --git a/core/lib/Drupal/Component/PhpStorage/FileStorage.php b/core/lib/Drupal/Component/PhpStorage/FileStorage.php
index 71ff3f2..4399da6 100644
--- a/core/lib/Drupal/Component/PhpStorage/FileStorage.php
+++ b/core/lib/Drupal/Component/PhpStorage/FileStorage.php
@@ -52,15 +52,23 @@ public function load($name) {
    * Implements Drupal\Component\PhpStorage\PhpStorageInterface::save().
    */
   public function save($name, $code) {
-    $path = $this->getFullPath($name);
-    $directory = dirname($path);
-    if ($this->ensureDirectory($directory)) {
-      $htaccess_path =  $directory . '/.htaccess';
-      if (!file_exists($htaccess_path) && file_put_contents($htaccess_path, static::htaccessLines())) {
-        @chmod($htaccess_path, 0444);
+    if (\Drupal::lock()->acquire($name)) {
+      $path = $this->getFullPath($name);
+      $directory = dirname($path);
+      if ($this->ensureDirectory($directory)) {
+        $htaccess_path =  $directory . '/.htaccess';
+        if (!file_exists($htaccess_path) && file_put_contents($htaccess_path, static::htaccessLines())) {
+          @chmod($htaccess_path, 0444);
+        }
       }
+
+      $ok = (bool) file_put_contents($path, $code);
+      \Drupal::lock()->release($name);
+
+      return $ok;
     }
-    return (bool) file_put_contents($path, $code);
+
+    return FALSE;
   }
 
   /**