diff --git a/MD_STD_CACHE.php b/MD_STD_CACHE.php
index 99049ac..ca4c241 100644
--- a/MD_STD_CACHE.php
+++ b/MD_STD_CACHE.php
@@ -60,7 +60,7 @@ final class MD_STD_CACHE {
 
             if (($redisResult = $redis->get($redisKey))) {
 
-                if (strlen($redisResult) > 3) {
+                if (strlen($redisResult) > 3 and strpos($redisResult, ' id="errorPage"') === false) {
                     $redis->close();
                     return $redisResult;
                 }