diff --git a/modules/entity/src/create_adapter.ts b/modules/entity/src/create_adapter.ts
index c51f85295f..02f345c218 100644
--- a/modules/entity/src/create_adapter.ts
+++ b/modules/entity/src/create_adapter.ts
@@ -29,6 +29,8 @@ export function createEntityAdapter<T>(
     : createUnsortedStateAdapter(selectId);
 
   return {
+    selectId,
+    sortComparer,
     ...stateFactory,
     ...selectorsFactory,
     ...stateAdapter,
diff --git a/modules/entity/src/models.ts b/modules/entity/src/models.ts
index 9f763391b9..4e60955388 100644
--- a/modules/entity/src/models.ts
+++ b/modules/entity/src/models.ts
@@ -76,6 +76,8 @@ export type EntitySelectors<T, V> = {
 };
 
 export interface EntityAdapter<T> extends EntityStateAdapter<T> {
+  selectId: IdSelector<T>;
+  sortComparer: false | Comparer<T>;
   getInitialState(): EntityState<T>;
   getInitialState<S extends object>(state: S): EntityState<T> & S;
   getSelectors(): EntitySelectors<T, EntityState<T>>;