diff --git a/types/mongoose/index.d.ts b/types/mongoose/index.d.ts
index 9673733113..d3dbc9d6aa 100644
--- a/types/mongoose/index.d.ts
+++ b/types/mongoose/index.d.ts
@@ -1421,6 +1421,8 @@ declare module "mongoose" {
     isNew: boolean;
     /** The documents schema. */
     schema: Schema;
+    /** Empty object that you can use for storing properties on the document */
+    $locals: { [k: string]: any };
   }
 
   interface MongooseDocumentOptionals {
diff --git a/types/mongoose/mongoose-tests.ts b/types/mongoose/mongoose-tests.ts
index a0b3102b6d..397ef94490 100644
--- a/types/mongoose/mongoose-tests.ts
+++ b/types/mongoose/mongoose-tests.ts
@@ -732,6 +732,7 @@ mongoose.plugin<PluginOption>(AwesomeLoggerPlugin, {modelName: 'Executive', time
  */
 var doc = <mongoose.MongooseDocument> {};
 doc.$isDefault('path').valueOf();
+doc.$locals.field = 'value';
 const docDotDepopulate: mongoose.MongooseDocument = doc.depopulate('path');
 doc.equals(doc).valueOf();
 doc.execPopulate().then(function (arg) {