diff --git a/packages/@orbit/jsonapi/src/resource-document.ts b/packages/@orbit/jsonapi/src/resource-document.ts
index d2f92d86..a7c997aa 100644
--- a/packages/@orbit/jsonapi/src/resource-document.ts
+++ b/packages/@orbit/jsonapi/src/resource-document.ts
@@ -24,6 +24,7 @@ export type ResourceRelationship =
 
 export interface Resource {
   id?: string;
+  lid?: string;
   type: string;
   attributes?: Dict<unknown>;
   relationships?: Dict<ResourceRelationship>;
diff --git a/packages/@orbit/jsonapi/src/serializers/jsonapi-resource-identity-serializer.ts b/packages/@orbit/jsonapi/src/serializers/jsonapi-resource-identity-serializer.ts
index e8c0b9ff..9e57e6ef 100644
--- a/packages/@orbit/jsonapi/src/serializers/jsonapi-resource-identity-serializer.ts
+++ b/packages/@orbit/jsonapi/src/serializers/jsonapi-resource-identity-serializer.ts
@@ -91,6 +91,8 @@ export class JSONAPIResourceIdentitySerializer extends JSONAPIBaseSerializer<
 
     if (resourceId !== undefined) {
       resource.id = resourceId;
+    } else {
+      resource.lid = id;
     }
 
     return resource;