diff --git a/types/mongoose/index.d.ts b/types/mongoose/index.d.ts
index 7e45ea835a..b819e37ad9 100644
--- a/types/mongoose/index.d.ts
+++ b/types/mongoose/index.d.ts
@@ -516,7 +516,7 @@ declare module "mongoose" {
     /** defaults to 1 */
     parallel?: number;
   }
-  
+
   /*
    * section querycursor.js
    * http://mongoosejs.com/docs/api.html#querycursor-js
@@ -807,7 +807,7 @@ declare module "mongoose" {
    * Intellisense for Schema definitions
    */
   interface SchemaDefinition {
-    [path: string]: SchemaTypeOpts<any>;
+    [path: string]: SchemaTypeOpts<any> | Schema | SchemaType;
   }
 
   /*
@@ -2723,7 +2723,7 @@ declare module "mongoose" {
     passRawResult?: boolean;
     /** overwrites the schema's strict mode option for this update */
     strict?: boolean;
-    /** 
+    /**
      * if true, run all setters defined on the associated model's schema for all fields
      * defined in the query and the update.
      */
diff --git a/types/mongoose/mongoose-tests.ts b/types/mongoose/mongoose-tests.ts
index 7216ed73fb..d6f262ebf6 100644
--- a/types/mongoose/mongoose-tests.ts
+++ b/types/mongoose/mongoose-tests.ts
@@ -368,8 +368,8 @@ new mongoose.Schema({d: {type: Date, min: [
 new mongoose.Schema({
   integerOnly: {
     type: Number,
-    get: v => Math.round(v),
-    set: v => Math.round(v)
+    get: (v: number) => Math.round(v),
+    set: (v: number) => Math.round(v)
   }
 });
 new mongoose.Schema({ name: { type: String, validate: [