diff --git a/model/security/role.smithy b/model/security/role.smithy
index 44f412b77..8a7bc5aca 100644
--- a/model/security/role.smithy
+++ b/model/security/role.smithy
@@ -17,7 +17,7 @@ structure Role {
     hidden: Boolean
     description: String
     cluster_permissions: ClusterPermission
-    index_permissions: IndexPermission
+    index_permissions: IndexPermissionList
     tenant_permissions: TenantPermission
     static: Boolean
 }
@@ -33,6 +33,10 @@ structure IndexPermission {
     allowed_actions: AllowedActions
 }
 
+list IndexPermissionList {
+    member: IndexPermission
+}
+
 list TenantPermission {
     member: String
 }