diff --git a/types/ember-data__adapter/error.d.ts b/types/ember-data__adapter/error.d.ts
index d8fbece163..a0c135389f 100644
--- a/types/ember-data__adapter/error.d.ts
+++ b/types/ember-data__adapter/error.d.ts
@@ -1,6 +1,7 @@
 import DS from 'ember-data';
 
-export import AdapterError = DS.AdapterError;
+export default DS.AdapterError;
+
 export import InvalidError = DS.InvalidError;
 export import UnauthorizedError = DS.UnauthorizedError;
 export import ForbiddenError = DS.ForbiddenError;
diff --git a/types/ember-data__adapter/test/error.ts b/types/ember-data__adapter/test/error.ts
index bd937fc1be..7256867c3f 100644
--- a/types/ember-data__adapter/test/error.ts
+++ b/types/ember-data__adapter/test/error.ts
@@ -22,5 +22,9 @@ class MyInvalid extends InvalidError {
     }
 }
 
+const invalid = new MyInvalid();
+
+const isInvalid = invalid instanceof AdapterError; // $ExpectType<boolean>
+
 errorsHashToArray({}); // $ExpectType<any[]>
 errorsArrayToHash([]); // $ExpectType<{}>