diff --git a/bootstrapvz/base/manifest-schema.yml b/bootstrapvz/base/manifest-schema.yml
index 4fcd09e..b056548 100644
--- a/bootstrapvz/base/manifest-schema.yml
+++ b/bootstrapvz/base/manifest-schema.yml
@@ -173,6 +173,8 @@ definitions:
     additionalProperties: false
   partition_table:
     type: object
+    patternProperties:
+      ^(?!type|boot|root|swap).*: {$ref: '#/definitions/partition'}
     properties:
       boot: {$ref: '#/definitions/partition'}
       root: {$ref: '#/definitions/partition'}