diff --git a/models/card/src/index.ts b/models/card/src/index.ts
index 39fd592d1dd..e08230de444 100644
--- a/models/card/src/index.ts
+++ b/models/card/src/index.ts
@@ -93,6 +93,11 @@ export class TTag extends TMixin implements Tag {
 @Model(card.class.Card, core.class.Doc, DOMAIN_CARD)
 @UX(card.string.Card, card.icon.Card)
 export class TCard extends TDoc implements Card {
+  @Prop(TypeRef(card.class.CardSpace), core.string.Space)
+  @Index(IndexKind.Indexed)
+  @ReadOnly()
+  declare space: Ref<CardSpace>
+
   @Prop(TypeRef(card.class.MasterTag), card.string.MasterTag)
   declare _class: Ref<MasterTag>