diff --git a/types/three/index.d.ts b/types/three/index.d.ts
index 8a83de8cae..35da8911ed 100644
--- a/types/three/index.d.ts
+++ b/types/three/index.d.ts
@@ -18,6 +18,7 @@
 //                 Apurva Ojas <https://github.com/apurvaojas>,
 //                 Tiger Oakes <https://github.com/NotWoods>,
 //                 Seth Kingsley <https://github.com/sethk>
+//                 Ethan Kay <https://github.com/elk941>
 // Definitions: https://github.com//DefinitelyTyped
 
 export * from "./three-core";
@@ -28,6 +29,7 @@ export * from "./three-copyshader";
 export * from "./three-css3drenderer";
 export * from "./three-ctmloader";
 export * from "./three-ddsloader";
+export * from './three-dragcontrols';
 export * from "./three-editorcontrols";
 export * from "./three-effectcomposer";
 export * from "./three-examples";
diff --git a/types/three/three-core.d.ts b/types/three/three-core.d.ts
index 520db93b96..0cf83b7257 100755
--- a/types/three/three-core.d.ts
+++ b/types/three/three-core.d.ts
@@ -1447,6 +1447,15 @@ export class Geometry extends EventDispatcher {
     dispatchEvent(event: { type: string; [attachment: string]: any; }): void;
 }
 
+/**
+ * @see <a href="https://github.com/mrdoob/three.js/blob/master/examples/js/BufferGeometryUtils.js">examples/js/BufferGeometryUtils.js</a>
+ */
+export namespace BufferGeometryUtils {
+    export function mergeBufferGeometries(geometries: BufferGeometry[]): BufferGeometry;
+    export function computeTangents(geometry: BufferGeometry): null;
+    export function mergeBufferAttributes(attributes: BufferAttribute[]): BufferAttribute;
+}
+
 /**
  * @deprecated
  */
diff --git a/types/three/three-dragcontrols.d.ts b/types/three/three-dragcontrols.d.ts
new file mode 100644
index 0000000000..5f4afbb0b4
--- /dev/null
+++ b/types/three/three-dragcontrols.d.ts
@@ -0,0 +1,5 @@
+import {Camera, Object3D} from './three-core';
+
+export class DragControls {
+    constructor(objects: Object3D[], camera: Camera, domElement?: HTMLElement);
+}