diff --git a/src/Symfony/Component/Cache/Tests/Adapter/AdapterTestCase.php b/src/Symfony/Component/Cache/Tests/Adapter/AdapterTestCase.php
index a72ae663f09d6..123cda89b8728 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/AdapterTestCase.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/AdapterTestCase.php
@@ -296,6 +296,15 @@ public function testWeirdDataMatchingMetadataWrappedValues()
 
         $this->assertTrue($cache->hasItem('foobar'));
     }
+
+    public function testNullByteInKey()
+    {
+        $cache = $this->createCachePool(0, __FUNCTION__);
+
+        $cache->save($cache->getItem("a\0b")->set(123));
+
+        $this->assertSame(123, $cache->getItem("a\0b")->get());
+    }
 }
 
 class NotUnserializable
diff --git a/src/Symfony/Component/Cache/Traits/ApcuTrait.php b/src/Symfony/Component/Cache/Traits/ApcuTrait.php
index b56ae4f7c39ac..ace28c7d37bd8 100644
--- a/src/Symfony/Component/Cache/Traits/ApcuTrait.php
+++ b/src/Symfony/Component/Cache/Traits/ApcuTrait.php
@@ -54,7 +54,14 @@ protected function doFetch(array $ids)
         $unserializeCallbackHandler = ini_set('unserialize_callback_func', __CLASS__.'::handleUnserializeCallback');
         try {
             $values = [];
-            foreach (apcu_fetch($ids, $ok) ?: [] as $k => $v) {
+            $ids = array_flip($ids);
+            foreach (apcu_fetch(array_keys($ids), $ok) ?: [] as $k => $v) {
+                if (!isset($ids[$k])) {
+                    // work around https://github.com/krakjoe/apcu/issues/247
+                    $k = key($ids);
+                }
+                unset($ids[$k]);
+
                 if (null !== $v || $ok) {
                     $values[$k] = $v;
                 }