diff --git a/cache/stores/memcache/lib.php b/cache/stores/memcache/lib.php
index 1ee6e5e824e..21e8f6c2c52 100644
--- a/cache/stores/memcache/lib.php
+++ b/cache/stores/memcache/lib.php
@@ -216,7 +216,7 @@ class cachestore_memcache extends cache_store implements cache_is_configurable {
      * @return int
      */
     public static function get_supported_modes(array $configuration = array()) {
-        return self::MODE_APPLICATION + self::MODE_SESSION;
+        return self::MODE_APPLICATION;
     }
 
     /**
diff --git a/cache/stores/memcached/lib.php b/cache/stores/memcached/lib.php
index 1bce7aab7e1..2c601fefe1a 100644
--- a/cache/stores/memcached/lib.php
+++ b/cache/stores/memcached/lib.php
@@ -224,7 +224,7 @@ class cachestore_memcached extends cache_store implements cache_is_configurable
      * @return int
      */
     public static function get_supported_modes(array $configuration = array()) {
-        return self::MODE_APPLICATION + self::MODE_SESSION;
+        return self::MODE_APPLICATION;
     }
 
     /**
diff --git a/cache/stores/mongodb/lib.php b/cache/stores/mongodb/lib.php
index a6fd6a26c0e..cdf764f4cde 100644
--- a/cache/stores/mongodb/lib.php
+++ b/cache/stores/mongodb/lib.php
@@ -175,7 +175,7 @@ class cachestore_mongodb extends cache_store implements cache_is_configurable {
      * @return int
      */
     public static function get_supported_modes(array $configuration = array()) {
-        return self::MODE_APPLICATION + self::MODE_SESSION;
+        return self::MODE_APPLICATION;
     }
 
     /**