diff --git a/cache/stores/mongodb/lib.php b/cache/stores/mongodb/lib.php
index 0213b7f86ec..f30323d37bd 100644
--- a/cache/stores/mongodb/lib.php
+++ b/cache/stores/mongodb/lib.php
@@ -166,7 +166,7 @@ class cachestore_mongodb extends cache_store implements cache_is_configurable {
      * @return bool
      */
     public static function are_requirements_met() {
-        return class_exists('Mongo');
+        return class_exists('MongoClient') || class_exists('Mongo');
     }
 
     /**