diff --git a/pbs-api-types/src/datastore.rs b/pbs-api-types/src/datastore.rs
index 77c1258f..b1dd09d4 100644
--- a/pbs-api-types/src/datastore.rs
+++ b/pbs-api-types/src/datastore.rs
@@ -40,6 +40,7 @@ pub const BACKUP_ARCHIVE_NAME_SCHEMA: Schema = StringSchema::new("Backup archive
     .schema();
 
 pub const BACKUP_ID_FORMAT: ApiStringFormat = ApiStringFormat::Pattern(&BACKUP_ID_REGEX);
+pub const BACKUP_GROUP_FORMAT: ApiStringFormat = ApiStringFormat::Pattern(&GROUP_PATH_REGEX);
 
 pub const BACKUP_ID_SCHEMA: Schema = StringSchema::new("Backup ID.")
     .format(&BACKUP_ID_FORMAT)
@@ -57,6 +58,10 @@ pub const BACKUP_TIME_SCHEMA: Schema = IntegerSchema::new("Backup time (Unix epo
     .minimum(1_547_797_308)
     .schema();
 
+pub const BACKUP_GROUP_SCHEMA: Schema = StringSchema::new("Backup Group")
+    .format(&BACKUP_GROUP_FORMAT)
+    .schema();
+
 pub const DATASTORE_SCHEMA: Schema = StringSchema::new("Datastore name.")
     .format(&PROXMOX_SAFE_ID_FORMAT)
     .min_length(3)