diff --git a/services/storage-system/pkg/config/config.go b/services/storage-system/pkg/config/config.go
index ccc4ac1c96..b83bd7be20 100644
--- a/services/storage-system/pkg/config/config.go
+++ b/services/storage-system/pkg/config/config.go
@@ -85,7 +85,7 @@ type Drivers struct {
 
 // OCISDriver holds ocis Driver config
 type OCISDriver struct {
-	MetadataBackend string `yaml:"metadata_backend" env:"OCIS_DECOMPOSEDFS_METADATA_BACKEND;STORAGE_SYSTEM_OCIS_METADATA_BACKEND" desc:"The backend to use for storing metadata. Supported values are 'xattrs' and 'ini'. The setting 'xattrs' uses extended attributes to store file metadata while 'ini' uses a dedicated file to store file metadata. Defaults to 'xattrs'."`
+	MetadataBackend string `yaml:"metadata_backend" env:"OCIS_DECOMPOSEDFS_METADATA_BACKEND;STORAGE_SYSTEM_OCIS_METADATA_BACKEND" desc:"The backend to use for storing metadata. Supported values are 'xattrs' and 'messagepack'. The setting 'xattrs' uses extended attributes to store file metadata while 'messagepack' uses a dedicated file to store file metadata. Defaults to 'xattrs'."`
 	// Root is the absolute path to the location of the data
 	Root string `yaml:"root" env:"STORAGE_SYSTEM_OCIS_ROOT" desc:"Path for the directory where the STORAGE-SYSTEM service stores it's persistent data. If not defined, the root directory derives from $OCIS_BASE_DATA_PATH:/storage."`
 
diff --git a/services/storage-users/pkg/config/config.go b/services/storage-users/pkg/config/config.go
index fd160cef31..f6af0c48ec 100644
--- a/services/storage-users/pkg/config/config.go
+++ b/services/storage-users/pkg/config/config.go
@@ -99,7 +99,7 @@ type Drivers struct {
 
 // OCISDriver is the storage driver configuration when using 'ocis' storage driver
 type OCISDriver struct {
-	MetadataBackend string `yaml:"metadata_backend" env:"OCIS_DECOMPOSEDFS_METADATA_BACKEND;STORAGE_USERS_OCIS_METADATA_BACKEND" desc:"The backend to use for storing metadata. Supported values are 'xattrs' and 'ini'. The setting 'xattrs' uses extended attributes to store file metadata while 'ini' uses a dedicated file to store file metadata. Defaults to 'xattrs'."`
+	MetadataBackend string `yaml:"metadata_backend" env:"OCIS_DECOMPOSEDFS_METADATA_BACKEND;STORAGE_USERS_OCIS_METADATA_BACKEND" desc:"The backend to use for storing metadata. Supported values are 'xattrs' and 'messagepack'. The setting 'xattrs' uses extended attributes to store file metadata while 'messagepack' uses a dedicated file to store file metadata. Defaults to 'xattrs'."`
 	// Root is the absolute path to the location of the data
 	Root                string `yaml:"root" env:"STORAGE_USERS_OCIS_ROOT" desc:"The directory where the filesystem storage will store blobs and metadata. If not defined, the root directory derives from $OCIS_BASE_DATA_PATH:/storage/users."`
 	UserLayout          string `yaml:"user_layout" env:"STORAGE_USERS_OCIS_USER_LAYOUT" desc:"Template string for the user storage layout in the user directory."`
@@ -121,7 +121,7 @@ type OCISDriver struct {
 
 // S3NGDriver is the storage driver configuration when using 's3ng' storage driver
 type S3NGDriver struct {
-	MetadataBackend string `yaml:"metadata_backend" env:"STORAGE_USERS_S3NG_METADATA_BACKEND" desc:"The backend to use for storing metadata. Supported values are 'xattrs' and 'ini'. The setting 'xattrs' uses extended attributes to store file metadata while 'ini' uses a dedicated file to store file metadata. Defaults to 'xattrs'."`
+	MetadataBackend string `yaml:"metadata_backend" env:"STORAGE_USERS_S3NG_METADATA_BACKEND" desc:"The backend to use for storing metadata. Supported values are 'xattrs' and 'messagepack'. The setting 'xattrs' uses extended attributes to store file metadata while 'messagepack' uses a dedicated file to store file metadata. Defaults to 'xattrs'."`
 	// Root is the absolute path to the location of the data
 	Root                string `yaml:"root" env:"STORAGE_USERS_S3NG_ROOT" desc:"The directory where the filesystem storage will store metadata for blobs. If not defined, the root directory derives from $OCIS_BASE_DATA_PATH:/storage/users."`
 	UserLayout          string `yaml:"user_layout" env:"STORAGE_USERS_S3NG_USER_LAYOUT" desc:"Template string for the user storage layout in the user directory."`